Thread: ID sbc engine

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engine#3970010 could be 68-327 or a 69-79-350 or one site said a camaro 302 any ideal how to narrow it down without pulling head???

get # off left front pad ahead of head. could pull valve covers and get head ID.

Or get the julian date code off the back of the block next to the 3970010 number.

Originally Posted by plumpurpleplym

engine#3970010 could be 68-327 or a 69-79-350 or one site said a camaro 302 any ideal how to narrow it down without pulling head???

The chev rebuild book I have says its a 350 CID - 68-69 & used on Trucks and high performance applications ( 4 bolt main )
If it was a 302 it would be a block with large journal crank
The heads used for the 302 were casting no - 3927187

plumpurpleplym here heads are 1.94/1.50 only # I found on back of block GM40 havent found any way to get a look at frount # in frount of head .

http://www.nastyz28.com/sbchevy/sblock.php
http://www.nastyz28.com/gm-chevy-cod...s-suffix-2.php

Take a look at those two links I provided. You will need to pull the numbers at the front of the block on the flat plate on the passenger side to really know anymore. Most likely it's a mid 70's 350 2 or 4 bolt main. Unless you plan to push some SERIOUS horsepower and torque I wouldn't worry about the mains. 2 bolt is plenty for a hopped up street motor, plus they make kits to beef a 2 bolt main up. Your bigger cars and trucks I believe are the ones that will have the 4 bolt main. Only way to REALLY know is to pull the pan and check. Seems like EVERYONE online will sell a 350 and tell you it's a 4 bolt main and then when you pull the pan, you find out it's a 2. Lots of people blow lots of smoke to make things sound better (just like the whole double hump head crap).

Good luck and I hope the links shed some light on your questions!