help me id this block

[bean]

i'm trying to identify the engine in my 72. i'm 99% it's a 350 but a two bolt or 4 bolt? the casting# is 3970014. maybe it's just the info i have but i can't find reference to this number. any help is appreciated.

[leftybass209]

This is some quick google info I found. It's non-descript as to 2 or 4 bolt for any vehicle.

Camaro

1970-73 3970014 350 200-300hp 2/4 bolt LA built Camaro

3970014 68-76 350 210-300hp 2-bolt mains Pass.

3970014 68-79 350 200-255hp 2&4Bolt main

Next:
3970014 350 69-77 Pass, Chevelle, Camaro, Nova, Monte Carlo 2 or 4 bolt main

Our Trucks
3970014 350 69-79 Truck 2 or 4 bolt main

Corvette
3970014 350 72 Corvette late '72,200 HP,255 HP 4 bolt main

Next:
3970014 1970-75 350 2/4
3970014 1968-79 350 only 200&255 2/4

[71K20chevy]

http://www.chevelles.com/forums/showthread.php?t=283806

So it looks like it's a 69-79 truck block, but the casting # doesn't say whether it is 2 or 4 bolt.

[Mindl3ss]

The only way to be sure of it being 2 or 4 bolt is to pull the oil pan and inspect it.

I've never found solid info on casting numbers. They always offer too great a range.

Check on the front passenger side of the engine just under the head, there may be a partial VIN stamped on it. I've heard some say that is for passenger cars only, so it may not apply.

If it is original to the truck it's a better chance of being a 4-bolt than if it's a transplant from a car.

[BLT gmc]

According to the notes I have it is a 350 for 68 to 79 car or truck. It is listed as 2 or 4 bolt. Sorry, wish I could be more accurate. Bruce

[BLT gmc]

Wow, thats a lot of typing at the same time. Bruce

[bean]

thanks to all for the quick response