Chevy carte motor casting number 10066036 how much power it puting out
try mortec.com
check the engine block casting number
Intake Manifold 140557055 is for a 283 SB Chevy.
chevy 350
1969-1973 chevy 307
it is a 1969-1979 motor it was used in cars, trucks, and vettes
Are you sure it is not 3951511? http://outintheshop.com/faq/casting/castings2.html
If it isn't a straight 6 you will have to find the casting number on the back of the block with the year and date. Most likely its a 283.
1969
motor #3978010
That should be a 4 bolt main 350