What motor is this?

[JirehCustoms]

This is the only numbers that I can find on this motor in my shop. I have not found and stamped numbers at all. Does anyone know what this is? It came out of a 2500 utility truck.

[gmtech4]

again i say" May " it could be a 350 sb or a 400 ...

 

do you have a VIN ???

 

your pics are useless to me anyways

[wierdo124]

GMT400s didn't come with 400s ever. If it's a '91 or '92 3/4 ton it has to be a 350 or a 454 or a diesel.

[C/K Man]

It's probably a 14093638 casting block, which would most likely mean it's a Gen. 1 TBI truck 5.7L, could be most any year 1988-1995. It should have a 1 piece rear main seal, roller lifters, and 4 bolt mains.