look at the back of the block to the left of the top tranny bolt, it will say GM 5.0 or 5.7lg
4bolt 350ci
You can refer to your user manual to ID the rear end gear ration in 80 Chevy pickup.
mortec.com
GM engine block # 3970010 was used as early as 1968 on some 327ci engines. From 1969-1979 it was a 350ci engine. It could be a 2 or 4 bolt block used in cars, trucks and even corvettes. You can also find these blocks with a "MEXICO" stamp on them near the block ID. It has been said that these are high nickle content blocks and may be stronger than others.
First id have to get my back brakes on your Chevy 2500 silverado.
id take the rocket my self it has a little more power than the Chevy 350
Sometimes you can find information at mortec.com and http://www.nastyz28.com/chevy-engine-code-stampings.php
The ID# is stamped on a pad at the front of the block, near the passenger side head. You can write the number down and look for it at Mortec.com. Most Chevrolet engines are listed there. there is a casting number on the block, usually on the side. the casting no. can tell you where ,and when the block was made. you might have to look the no. up in a Chevy casting no. book, or your Chevy dealer might be able to look it up on the computer,if they are willing to spend the time. the casting no. and the ID no. that the above answer talks of are not the same, although they can both give you the info. you want.
The numbers stamped in front of the head are the engine id numbers.
id check, but i thought there was a recall on that problem. id call the dealer and give them the last 8 of the vin number and see.
Yeah depending on the price id buy it
Try going to http://www.automotivetalk.net/showmessages.php?id=3791 . Try going to http://www.automotivetalk.net/showmessages.php?id=3791 .