427 Engine help please

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Mar 18, 2005 | 04:36 PM

427forever

Thread Starter

4th Gear

Joined: Mar 2005

Posts: 4

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427 Engine help please

Hello,
I just purchased a 427 engine. I was told it is out of a 68.
The numbers are as follows...

3963512
GM
T7
A29071
HI PER
PASS
F
7

Any help would be appreciated.

Mar 18, 2005 | 05:10 PM

Tom454

Le Mans Master

Joined: Apr 1999

Posts: 6,134

Likes: 46

From: Raleigh North Carolina

Are those the numbers stamped on the front of the block, below the front of the valve cover & cylinder head (on the pad)?

Mar 18, 2005 | 05:16 PM

427basketcase

Drifting

Joined: May 2002

Posts: 1,546

Likes: 5

From: Sacramento California

3963512 casting is for a 69 427 or a 70-76 454 I don't think it's a 68 block. You need to get the date code and the suffix off of the pad to know for sure what you have.
If I'm reading your info correct it looks like a 71 454

Last edited by 427basketcase; Mar 18, 2005 at 05:19 PM.

Mar 18, 2005 | 05:22 PM

Daniels

Advanced

Joined: Jun 2003

Posts: 74

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From: Santo Domingo DR

There is a great page with lots of info on BBC engines.
http://www.mortec.com/bbc.htm

Your numbers show the following:
Casting Number:
3963512....427.......69......2 or 4 bolt
3963512....454.......70-76...2 or 4 bolt

If you have the cylinder head casting numbers you can check it on this page too.

What was the number stamped on the block?
You can check it out on this page:
http://www.nastyz28.com/spmenu.html

Good Luck

Mar 22, 2005 | 12:39 PM

427forever

Thread Starter

4th Gear

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Posts: 4

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Will I have to remove the intake or heads to get the numbers off of the pad? All the numbers I gave in my previous post were off the back of the block where the transmission bolts up to.
Im not sure if the heads are original. The numbers are :
8933148 (under the valve cover passenger side)
A79 (pass. side)
H346 (Back of heads)

This motor was complety rebuilt several years ago. Im trying to figure out exactly what it is because I have to sell it.
It has APR Rod Main Bolts,
7 qt Moroso Oil Pan
Fluid Harmonic Balancer
Solid Motor Mounts
Cam is around 630
12.5 to 1 Pistons
Bored .60 Over

This motor was only bench ran and never installed in a vehicle
Thanks to the experts for your help

If anyone is interested in it, I can provide pictures.

Mar 22, 2005 | 01:22 PM

gkull

Team Owner

Joined: Apr 1999

Posts: 21,953

Likes: 1,445

From: Reno Nevada

2024 C3 of the Year Finalist- Modified

The block number says that it is a 71 454. over the years somebody could have thrown in a different crank and called it a 427 actually more like 436 with the overbore.

Mar 22, 2005 | 01:45 PM

Tom454

Le Mans Master

Joined: Apr 1999

Posts: 6,134

Likes: 46

From: Raleigh North Carolina

[QUOTE=427forever]Will I have to remove the intake or heads to get the numbers off of the pad? All the numbers I gave in my previous post were off the back of the block where the transmission bolts up to.
Im not sure if the heads are original. The numbers are :
8933148 (under the valve cover passenger side)
A79 (pass. side)
H346 (Back of heads)

No.... nothing needs to be removed... the pad number is visible by looking down past the head... at the parting line between the head & the block... at the front of the engine. If the area does not have a number, then the block was probably surfaced, and the number may be hard to read, or gone entirely.

This is the number that tells us what the engine was originally.