The Stovebolt Site Forums The Shop Area Engine Shop 1971 GMC engine id

I pulled a small block from a 1971 Gmc a few years ago and I was wondering what the specs are. Here is the numcers I found on the motor.
38 GM
3970010
This may not be the original motor that came in the gmc. I plan on rebuilding this motor to put in my 1948 Chevy 3600 wrecker.
Thanks for any help

Jarrod;
3970010 chevrolet blocks were used from 1960-1980 with some being 2bolt and some being 4bolt. If you have a correct year motor out of a 71 GMC, I've never seen anything but a 4bolt in a 69-72 truck. They are 350 c.i., 250 horsepower, 8.5:1 comp., 4bc.
I could tell you if it was a correct year motor with the letters and numbers off of the front pad, or by the date code off the back of the motor.

I'll get you those numbers this evening.

Here they are for the motor out of the GMC Vo811TYZ
These are the numbers from the motor in my 63 C-10.
V063oPV

Jarred;
You hit me up with some dandys for numbers!
There are no TYZ codes for 71, but for 70 there is a TAZ
For 63, there are no PV codes, there are PG and PK codes for 292 6cyl. Check those numbers again to make sure

These are not the original motors that came in these trucks.