vt65

3970010 327 block...what years and HP was it used in please?

Maymyvetteliveforevr

This is what a google search came up with:

It is one of the many sb Chevies produced from 68 thru the late seventies, cast at the Saginaw Mi. gray iron foundry, assembled in Flint Mi. engine plant. They came in two or four bolt. Only way to be sure is pull the pan. Horse Power ratings depended on which car/truck it was used in.


this is for the 3970010 block

3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4

1969-79 3970010 350 car, truck, Vette



3970010 350 69 Corvette late 69,4 bolt main
3970010 302 69 Camaro Z/28,Late 69, 4 bolt main
3970010 350 69-79 Truck 2&4 bolt main
3970010 350 69-79 Pass,Chevelle,Camaro,Nova,Monte Carlo 2&4 bolt main
3970010 350 70 Corvette 300,350,370 HP 4 bolt main
3970010 350 71 Corvette 270,330 HP 4 bolt main
3970010 350 72 Corvette 200,255 HP 4 bolt main


3970010 68 - 79 350 & 327 145-375 2&4-Bolt mains/Truck/Hi Perf



In 1968 they made 327's with this casting number but they were only 2 bolt main.

Then from 1969 - 1979 they made 350's with this number and they were either 2 or 4 bolt main.

If it's a 4 bolt main, then you know it's a 350.

To determine exactly what you have, you need the block "suffix code".

It's on the front of the engine, just in front of the passenger side head. It's on a machined pad only found on that side of the engine. Run a search with the numbers you find there for more information.

vt65

thanks, i'll have to get a better look ...