chevy 350
what does the casting number GM 3892657 say about this engine block
Numbers on the motor of trucks and other vehicles are identification numbers for the engine block casting. These numbers identify the batch of production the engine block comes from and can be used in recalls.
It's a 95-00 350.
There is casting numbers on the side of the block, just above the freeze plugs, that will give the casting date. give those numbers to year one dot com or some dealers, that fool with classics. they have the chart to convert the casting numbers to dates.
Find a book on casting numbers for chevys it will give you the year of the block the heads & the manifolds.
motor #3978010
3970010 can be a 350 two or four bolt block.
The GMC motor with block casting number 8970010 is typically associated with the 5.7L (350 cubic inch) small-block V8 engine. This engine was commonly used in various GMC and Chevrolet vehicles during the 1980s and early 1990s. It is part of the Gen I small-block family, known for its versatility and performance in trucks and cars alike.
Right above the motor mounts on the 304 V8 engines there is a large casting mark that says 304.
The best way to identify your motor is to use the casting numbers on the drivers side rear of the block, behind the cylender head. The cylender head casting numbers may help too, they are located under the valve cover.
Casting no on the block & then look it up.
I checked here: http://web.archive.org/web/20080516024247/http://www.mortec.com/castnum.htm but your number isn't listed. Perhaps you could recheck the block and compare it to the ones in Mortec.