I believe the numbers you want to look for are located on drivers side rear of block near wher transmission bell housing bolts up. Might be hard to see if it has the typical valve cover leakage. Hope that helps. Theses casting numbers should tell you what it came out of.
The casting numbers at rear will also tell you the c.i.d. There should be a date code on that flange or on the side of flange. I have also seen date code on side of block by freeze plugs. Hope that helps. If you find the numbers, I'll help you look them up.
LS1 if HMFIC is correct.
Wasn't even thinking towards ls1 seeing no mention of all aluminum block. Great motors with alot of potential. I have an iron block version in my truck and been very good to me.
They don't share a whole lot in common with the earlier small blocks beside displacement.
If they did they wouldn't be Gen IIIs, they'd still be Gen I! 
nastyz28.com along with the partial VIN (14s) above says it is a 350 CID from a 1974 A body (CMR), made 11/02 (1102) at the Flint plant (V)
http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-3.php
Get the casting date off the left rear of the block forward of the bell housing. That will verify the model year.
Feel free to show me where I'm wrong.
http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-3.php
Get the casting date off the left rear of the block forward of the bell housing. That will verify the model year.
Feel free to show me where I'm wrong.
If they did they wouldn't be Gen IIIs, they'd still be Gen I!
Can we call them GM Corporate Gen III small block? Guess I'm still bitter about GM killing off my beloved Pontiac motor division back in the late 70's
The LS based engine is a leap in engineering and capable of monstrous horsepower. I wish now that I had done a swap before I built my LT1.
Heck a stock 6L short block w/ good heads,cam and intake= 500 ponies or right at it,the cathedral design heads flow huge amounts of air.
Heck a stock 6L short block w/ good heads,cam and intake= 500 ponies or right at it,the cathedral design heads flow huge amounts of air.
