|05-25-2013 09:05 PM|
|05-25-2013 06:54 PM|
|1badLemans||If all else fails pull the intake off and the "400" or the "350" will be cast into the lifter valley and be plain as day.|
|05-24-2013 10:20 AM|
|05-23-2013 07:36 AM|
350 vs 400
Thanks for all the help the motor is in the car and I just haven't had time as of yet, hopefully this weekend I'll do some snooping around now that I'm armed with more info. Thanks Again!!
|05-22-2013 09:37 PM|
• Pontiac engine info
• Pontiac info/sites
|05-22-2013 08:49 PM|
This page has pictures....much better.....
How to identify your Pontiac engine
Look at it closely.
You have to ID the block, then the date code. Then the engine code is the last step.You cant ID the block merely from the code on the front as codes were used for may different engines over the years.
|05-22-2013 08:41 PM|
Here is a list
Pontiac Engine Block Casting Numbers
What numbers are the heads by the way?
|05-22-2013 08:38 PM|
Look on the back of the engine behind the passenger side cylinder head. There is a number cast into the block.
There are a few numbers for a 69 400. 9790071 is one
9792506 is for the RA IV
9792968 is the RA V
The first one is more common , the second two...not so much
A 9790079 is a 350
Look back there for the numbers.
|05-22-2013 08:33 PM|
good luck trying to ID the block, i havnt had much luck with mine.
the most for sure way to find out is by pulling the heads and measuring the bore. however, there is only .005" between a 400 and a 455. there are numbers on the passenger bank on the front face and the rear casting below the head.
mabe youll get lucky!
you can also look under the #1 exhaust port for a cubic inch casting.
if it says 350 or 400, it would be a post 73 block(i know in the 70's they started stamping them, just cant remember what year)
|05-22-2013 08:21 PM|
350 vs 400 pontiac engine ID
Recently bought a 69 Firebird and was told it is a 400 CU Pontiac engine. This is my first Pontiac and would appreciate any info as far as telling the difference between a 350 and 400. Thanks for any help I'm a new member.