Question on difference between early and late blocks

[Gregg]

I replaced the original 352 (C4AE block) in my '64 a few years ago with a late 390 (D3TE mirror 105 block).  It seems that the D3TE block sits a little farther back in the engine bay.  It's not so far back that things don't fit, It just seems that the fan farther away from the radiator than with the C4AE.  Is this just my imagination?

Thanks,

Gregg

[Rory428]

As long as you used the same 64 motor mounts, in the correct position, on the block, should be no difference in engine position. I replaced the original 332 FE in my 59 with a 428 Cobra Jet, using the 59 motor mounts, sits in the exact same position. The early blocks have just 2 motor mount bolt holes per side, the 65 and newer have 4 per side, but the old style mounting pattern is still there. Other differences are camshaft thrust plates, and provision for an alternator, that the early blocks did not use.

[thatdarncat]

Like Rory said, Ford just added two additional motor mount bolt holes on each side of the block starting in the ‘65 model year, Ford kept the original two holes on each side. That way the later block would back-fit the earlier cars. For curiosity sake I just double checked 5 FE/FT blocks I have sitting in the garage, with a tape measure check from the front of the block where it’s flat by the oil filter adapter pad, to the center of the lower bolt hole for the early motor mounts. They’re a C3AE 390, a C4AE 427 C.O., a C6ME-A, a ‘71 DIF FT and a D4TE FT, all measure the same. I’ve never seen anybody post a picture of a FE/FT block with the motor mount holes in a different location. I’m not saying your block might not be in a different position in the car, but I’d probably look first at if anything changed with the motor mounts - did they get swapped side to side? Or turned backwards? Turned upside down? Etc.

[Gregg]

Based on the above, the most likely thing is my error.  the 390 is in there, everything works and is hooked up.  I'll double check the motor mounts again.

Thanks

[galaxiex]

I have 2 sets of late 3 hole FE engine mounts.
Had them for years, don't remember where I got them, they are old/used but in good shape.

One set has the frame stud in what I "think" is the normal location for a 65 up Galaxie or other full size car.

The other set has the frame stud farther forward, which would set the engine back about an inch.
Would these be for a truck? or???

I can put pics up later....

[Rory428]

Photos would help, most PU mounts are a large rectangle, with the mounting holes pretty much centered top and bottom, with a stud in the middle. I have a pair of the used PU truck mounts in the garage, but have not found a way to take photos from my phone, and post them here.

[galaxiex]

Photos would help, most PU mounts are a large rectangle, with the mounting holes pretty much centered top and bottom, with a stud in the middle. I have a pair of the used PU truck mounts in the garage, but have not found a way to take photos from my phone, and post them here.

I email photos from my phone to myself,
then download them to my desktop computer, then edit pics on the comp and post.

Easy peasy. 


Pics coming soon....

[galaxiex]

Ok, here's what I got....

Part numbers molded into the rubber of the mounts


One upper mount in picture has...


C5AA-6038-C RH
C5AZ-6038-C RH


One lower "Truck" mount in pic has....


C9AA-6B032-G
  AU  42

This is exactly what is molded into the rubber.


The others are un-readable.

[Rory428]

I don`t think either set are factory PU truck mounts. Every 67-76 F series PU mount that I have seen, had only 2 bolts attaching the mount to the block, and didn`t look anything like those in the photo.

[galaxiex]

I thought the 3 holes to the block was pretty normal for all 65-up FE mounts.

2 hole for small blocks and others, and the early pre 65 FE


I once had a 1973 F-100 with factory 390.
It had mounts like the top ones in the pic.
Used all 3 holes to the block


Side note,
I considered using the lower mounts in the Galaxie to get a little engine set-back.
But then I might run into header fitment and other issues...

[cjshaker]

Seems to me that if the engine was noticeably set back that it would cause serious issues with the trans mount, linkages etc.

I've used early blocks in later chassis, and vice versa, and never had any issue with things changing. When using a C4 block in my '68 Highboy, I just fabbed a set of plates that spanned the later mounts to the early block holes. Nothing changed. Later blocks in earlier chassis should not change anything.