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FE Power Forums => Private Classifieds => Topic started by: Urgefor on October 01, 2025, 01:02:02 AM

Title: WTB: C5AE 390 block with crossbolt bosses
Post by: Urgefor on October 01, 2025, 01:02:02 AM

As noted in this post, (https://fepower.net/simplemachinesforum/index.php?topic=12292.0) apparently C5AE 390 blocks with the crossbolt bosses (similar the to late '63 and '64 blocks but with the 4 bolt motor mount configuration) exist and I would like to purchase one.  Thanks in advance for any leads or information.

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: 482supersnake on October 01, 2025, 04:01:29 PM

I have a std bore C5AE 427 block. It’s cross bolted. Had a rapair but is in usable condition. $1000

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: Urgefor on October 01, 2025, 08:15:27 PM

Thanks.  I'll keep that in mind.  Looking for a 390 version since I already have a stroker rotating assembly with .030 over pistons (4.08) and some Billet Speedworks crossbolt main caps.

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: hbstang on October 02, 2025, 02:29:31 PM

428 supersnake is that 427 block a side oiler,and what was the repair?where are you located?

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: 482supersnake on October 02, 2025, 04:59:28 PM

https://seattle.craigslist.org/tac/pts/d/tacoma-1965-ford-427-fe/7885837281.html

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: FERoadster on October 04, 2025, 02:59:08 PM

Where are you located?
I've got a C5 block that has been cross bolted but is +040 and needs a slight cleanup.
$550 Plus shipping.
I'm in Brookings Oregon 97415
Richard >>> FERoadster

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: Urgefor on October 06, 2025, 12:28:19 AM

I'm in the big town of Iowa.  Any idea what the current cylinder wall thickness is after being bored .040 over?

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: FERoadster on October 06, 2025, 01:59:20 PM

Couldn't find the sonic test it this morning, but I know the thinnest cylinder is 0,107 so I figured to take it to 50 over that cylinder would be at 0,97.
Quite sure that all the rest were around .120. The thinnest was either #4 or #8.
I'll look for the chart this evening.
Richard

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: FERoadster on October 07, 2025, 09:56:49 PM

Still looking. My computer hard drive crashed about 5 years ago and I lost a lot.
Think I may have a paper copy but still checking
Richard

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: FERoadster on October 10, 2025, 02:04:58 PM

Absolutely cannot find the sonic sheet paper copy and it's not on my computer
Richard

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: FERoadster on October 15, 2025, 05:17:23 PM

Ok looked in another folder and found it.
Looks like I'd put one sleeve in it #8 cylinder

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: FERoadster on October 15, 2025, 05:20:58 PM

Photo of the sonic sheet.
Edit and a correction to my first post. Since I've had this block for about 10 years I did not realize it's +60 not +40.
So looks like a bore to 65 over would be safe? Then it would require custom pistons.
Richard >>> FERoadster

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: Urgefor on October 16, 2025, 04:26:06 PM

Thank you for the information.  Unfortunately I don't see a path forward using your block that won't be lots and lots of extra $$ whether it is bore and get custom pistons or have it sleeved to fit the .030 over pistons I already have.   :(

Title: Re: WTB: C5AE 390 block with crossbolt bosses
Post by: Urgefor on November 10, 2025, 03:13:22 PM

I'm still looking.  Any information will be appreciated.