Thread: casting numbers

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i picked up a motor from my grandfather for my camaro project and he has no idea what size it is, it was in a dodge brothers rat rod he bought at a auction, the casting numbers are 3070010 and its a gm motor..any idea what size this motor is or what it came out of?

http://www.mortec.com/

this website dont have that casting number in its list

I just seen that. I believe its a high nickel block 4 bolt which is a good block.

im gonna have to..ive looked everywhere and cannot find this casting number

thanks for the effort to help.

I found this on another site.

This is out of a 1970 Chevelle, it is the 300 horse power block, it is the 4 bolt main, it is still STD bore, the casting # is 3070010, the date is A-31-0. The code on the pad is CRE.

Could it be 3970010? That matches with the 300 HP, 4 bolt 350 use in A, F and X bodies in 1970.

thanks alot guys.

you may want to recheck the second # it could be a 9 instead of a 0.
3970010 is 68 to 76 350.

'010' blocks are very common. I have three of them. The one I'm running now is a four bolt main. The other two are two bolt blocks. A very few of them were 327's when Chevy went to cast cranks with bigger journals on non hi-po applications after '67. This is good block.