Author Topic: 68 Mustang Memorial Day Weekend Thrash  (Read 59680 times)

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jayb

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68 Mustang Memorial Day Weekend Thrash
« on: May 22, 2015, 12:45:35 PM »
Seems like every year I end up with a major project over the Memorial Day weekend.  This year is no different, and in fact several months ago I decided that this was the weekend I was going to revamp my 68 Mustang fastback.  I've owned this car for about 10 years now, and never really done anything with it.  My first car, back in 1976, was a 67 Mustang fastback with the deluxe interior, 289 and automatic.  I bought my 68 Shelby convertible in 1978, and always regretted that I had to sell the 67 fastback to be able to afford the Shelby.  So, I bought the 68 fastback as kind of a replacement for my first Mustang.  Shortly after I bought it I acquired all the parts necessary to convert the interior to the 67 deluxe interior that I liked so much way back when, and its been sitting this way ever since.

Here's some pictures of the car as it sat in my driveway today:








Right now this car has several problems.  The major one is, that being an FE guy, I can't stand the small block that is in there.  I'm used to the effortless acceleration of the FE, and this engine labors mightily under acceleration despite its headers, aftermarket intake, and Holley double pumper.  Small blocks are for punks!  This thing has GOT to go:



I also have some issues with the electrical and charging system in the car, and the engine is now leaking a little antifreeze from the bypass hose, the carb needs to be rebuilt, the brakes (4 wheel drum) suck, and so does the suspension. 

So, over the last few years I've been collecting parts to do a wholesale drivetrain, suspension, and brake swap in this car.  I took today off work so I had a four day weekend to accomplish as much of this as I could, and I started out by putting all the parts I'm planning to use in one area:



The engine is my old reliable 428CJ dyno mule, which makes around 440 horsepower on the dyno with the Edelbrock Torker intake and Holley 750 double pumper carb.  Two years ago I picked up the T56 Magnum 6 speed transmission and installation kit from American Powertrain, and I'm planning to do whatever is necessary to get that combination installed in the car.  This part is going to be new to me, because I'll have to convert the clutch pedal to a hydraulic one, and use the hydraulic throwout bearing that came with the kit.  Plus, I'm figuring some floor modifications may be required.  But I'm looking forward to the overdrive gears in the transmission, and the smooth shifting that these things are noted for.

Also visible is a 57 Ford rear axle housing, an N-case with 4.11 gears and a Detroit locker, and the Mark Williams Masterline axles I had in my Mach 1 back in 2004 and 2005; these are going to have to be cut back a little because the 57 Ford axle housing is slightly narrower than the stock Mustang axle housing.  I'll also need to cut off the spring perches and weld on some new ones I got from Currie, to fit the leaf spring position in the Mustang.  I also have all new front suspension components, including upper and lower control arms, all the tie rod end pieces, and a 1" front sway bar.  Finally, there is a complete 4 wheel disc brake package from Wilwood for the car, including the master cylinder.

I'm still waffling on the rear suspension pieces; I'm really tempted to go with the Cal-Tracs and monoleaf springs again, because they work so well on my Mach 1, but I think I want to drive the car with the stock rear suspension in it first before I make that decision.  This is not going to be a track car, pretty much daily driver street duty in the summer, so if I can tame the wheel hop with some cheap traction bars I might just leave it as is.  We'll see after I drive it for a while.

I'll post updates throughout the weekend as I get going on this project.  I'm hoping to have all the parts installed by the end of the day Monday; I will still need to get a driveshaft and screw around with the electrical system, finish all the details, etc., but if I can get that all accomplished the heavy lifting will be done, and I can kind of tinker with the car over the next couple weeks to get it running and driving correctly. 

I may be asking questions about the T56 install, so if anybody has any advice for me on that, I'd love to hear it - Jay
« Last Edit: May 22, 2015, 05:29:58 PM by jayb »
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

XR7

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #1 on: May 22, 2015, 01:28:33 PM »
Cool project Jay. Nice car to start with as well. Should be very nice when you get done with it! Looking forward to your updates and writeup on this one. I'm no help on the T56 swap, but you might have to do a little tunnel "surgery", not sure really but TKO600's usually do.

57 lima bean

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #2 on: May 22, 2015, 02:16:11 PM »
I may have a drive shaft for you.I will measure and send in to ya.

cjshaker

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #3 on: May 22, 2015, 02:58:13 PM »
A leaking bypass hose is reason enough to pull that anemic looking engine and install an FE ;D

I used to mess with small blocks back in school and still have some performance pieces laying around. But once I rode in an FE Mustang, those days were over. WAY over! I gave some pieces to a friend who has a real nice '68 with a 289 to bump his horsepower up a bit. But it never fails, when I ride in his car I keep thinking to myself "This thing just isn't running right." I have to remind myself that it doesn't matter how well they run, they just don't have the acceleration or feel of brute power as an FE.

The car looks super solid and should be a great driver with that 428 and TKO.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

mike7570

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #4 on: May 22, 2015, 03:08:12 PM »
That interior sure looks familiar, my first car was a '67 390GT with the same interior. I to sold mine to purchase another car a "gulp" '77 special edition black and gold trans-am. Luckily I came to my senses and sold the trans-am to purchase a '67 Shelby GT500. Unfortunately I sold it back in '79.
I also have a '68 fastback that I bought like you did to replace the two '67's that I should never have sold.
Keep posting progress on your '68, I need the encouragement because I'm getting frustrated trying to find the time to get mine done. I may have bit off more than I can chew because my plans are to build a '67 Shelby stock eliminator car out of it, but if I get derailed with the racing plans I can always put it back on the street.

Question - Did you just replace the '68 heater control knobs with '67's, or did you change out the whole unit? 
« Last Edit: May 22, 2015, 03:11:11 PM by mike7570 »

turbohunter

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #5 on: May 22, 2015, 03:17:49 PM »
Let's see.....my to do list this weekend.
Completely disassemble and rebuild a car.......no problem :o
Only you pal.
I bow to you. I am not worthy.
Good luck, can't wait to read the updates.
Marc
'61 F100 292Y
'66 Mustang Injected 428
'66 Q code Country Squire wagon


ScotiaFE

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #6 on: May 22, 2015, 04:20:28 PM »
Awesome weekend project! Nice Car!
I didn't see a mention of the pipes?
I just dialed a QuickTime and it was right on mounted to my "mule 428". lol
Watch that pilot bearing fit.

Nightmist66

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #7 on: May 22, 2015, 05:14:10 PM »
Nice car Jay. That should be a good "weekend project". ::) I wish you well on your quest!
Jared



66 Fairlane GT 390 - .035" Over 390, Wide Ratio Top Loader, 9" w/spool, 4.86

jayb

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #8 on: May 22, 2015, 05:20:35 PM »
5:20 and the hated small block is out!



Now for a quick pressure wash of the engine compartment, and then I can spend the evening painting the engine bay.  Ready for the FE/Tremec test fit tomorrow...
« Last Edit: May 22, 2015, 06:52:59 PM by jayb »
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

jayb

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #9 on: May 22, 2015, 05:24:35 PM »
A leaking bypass hose is reason enough to pull that anemic looking engine and install an FE ;D


I couldn't agree more LOL!  Feeling like an FE snob today... ;D
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

jayb

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #10 on: May 22, 2015, 05:25:29 PM »
I may have a drive shaft for you.I will measure and send in to ya.
Wow, that would be cool.  Waiting with bated breath... 8)
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

jayb

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #11 on: May 22, 2015, 05:26:38 PM »

Question - Did you just replace the '68 heater control knobs with '67's, or did you change out the whole unit?

I replaced the whole panel that contains the sliders and the fan switch.
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

Nightmist66

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #12 on: May 22, 2015, 05:28:55 PM »
I've had a 289 side project for over 4 years with "big plans" on the build, but once I started working on my 390, I kind of forgot all about it. ::)
Jared



66 Fairlane GT 390 - .035" Over 390, Wide Ratio Top Loader, 9" w/spool, 4.86

jayb

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Re: 68 Mustang Memorial Day Weekend Thrash1
« Reply #13 on: May 22, 2015, 05:29:25 PM »
Awesome weekend project! Nice Car!
I didn't see a mention of the pipes?
I just dialed a QuickTime and it was right on mounted to my "mule 428". lol
Watch that pilot bearing fit.
I forgot to put the pipes in the picture, I've got one of those complete Magnaflow exhaust systems, 3" all the way back.

What should I watch for on the pilot bearing fit, Howie?  Do they come too loose or something?
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

ScotiaFE

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Re: 68 Mustang Memorial Day Weekend Thrash
« Reply #14 on: May 22, 2015, 06:09:36 PM »
When I mocked up my home made Jerico with the correct Ford input shaft, the pilot bearing
which was the standard 6303 bearing, it stuck out of the crank about 0.075" so the input
shaft splines where very close. I had about 0.010" clearance between the input shaft splines and the pilot bearing.
I felt this was to close for my liking. 
I had two options, one was radical machining or just make a pilot bushing to fit.
I used some personal stock of aluminum bronze and hacked one out.
I opened up the gap to 0.100".
I'm sure a web search would turn up better fitting bearing,
but it would have set the time line back a week minimum.
So a bushing it was.