What year is a 350 Chevy engine with casting no 3970010?

What year is a 350 Chevy engine with casting no 3970010?

What year is a 350 Chevy engine with casting no 3970010? 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.

What is the casting number for a GM 350?

Gm casting number 3970010, 350 4 bolt mail block.

Where is the suffix code on a 350 Chevy?

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.

Where is the oil pump on a GM mail block?

To the left side is the oil pump and filter. On the left side I have H4O 010 020 there is also A221 right above this which is stamped a lot smaller to the right side of the block there is 1 020 G51 other than that i did not see anything but the block does have some oil that is turned to sludge on it.

What are the casting numbers for a Chevy block?

Chevy Block Casting Numbers Use these casting numbers to identify the block you have. Small Block Casting numbers Casting Number Years CID Comments 330817 70-80 400 Car & Truck 2 & 4-bolt 3-freeze plugs 355909 75-79 262/305 car & Truck 2-bolt 360851 75-76 262

What is the casting number on a 350 cid engine?

The engine has a 3970010 casting number and an engine date code of “F 5 8”. From the research I’ve done, this casting number was put on 327 and 302 cid engines in 1968 and 1969 as well as 350 cid engines throughout the 70’s.

Where are the casting blocks on a corvette Z28?

The high performance versions (Z28, solid lifter Corvette, etc) had a high-nickel content. They can be identified by the numbers cast into the block on each side of the front cam journal — something like “010” on one side and “020” on the other, as I recall.

What is the date code on a 3970010 block?

Ok you have a 3970010 block, now look at the date code on the back of the block. If the date code is anything higher than 71 it is a 350. 68-70 it could be a 302, 327, or 350. The 302 block had additional stamping that read DZ, most likely it is not a DZ block. Next look at the heads and crank, check the casting numbers and dates on the heads.

Chevy Block Casting Numbers Use these casting numbers to identify the block you have. Small Block Casting numbers Casting Number Years CID Comments 330817 70-80 400 Car & Truck 2 & 4-bolt 3-freeze plugs

Can a Chevy 350 be a 2 bolt main?

The block can be either 2 or 4 bolt main. You have to look at suffix letter in front of the block on the pass. side. Behind the alt. There two or three letters. That will tell you the history of the motor. Just as lg1969 said it COULD be a 302 or 327, but it is most likely a 350, Ive had three of the 3970010 blocks and they were all 350s.