1970 Z28...Stacy
It is an excellent GM block.
It's probably a 1972 350.
4bolt 350ci
Gm 3970010 the model?
The code "GM 37 3970010" likely refers to a specific part or casting number associated with a General Motors engine block, particularly from the year 1937. The "GM" indicates the manufacturer, while "37" specifies the model year. The number "3970010" is a casting number that identifies the block's design, specifications, and compatibility with certain GM vehicles. This number can be used to find more information about the block's history and applications in GM cars or trucks.
it is a 1969-1979 motor it was used in cars, trucks, and vettes
A81 should be January 8, '71,'81,'91.
It's a 4" bore block. Has been used for 302, 327, and 350 engines.
350 and 327 [1966 - 1980]
1968------327 & 1969-79 ----350
GM engine block # 3970010 was used as early as 1968 on some 327ci engines. From 1969-1979 it was a 350ci engine. It could be a 2 or 4 bolt block used in cars, trucks and even corvettes. You can also find these blocks with a "MEXICO" stamp on them near the block ID. It has been said that these are high nickle content blocks and may be stronger than others.
The numbers you provided suggest that your Chevrolet 350 engine was manufactured in 1980. The casting number GM 3970010 corresponds to a 350 cubic inch engine produced between 1969 and 1980, with the suffix code V0817TBC indicating that it was assembled in August 1977 at the Van Nuys plant. Therefore, your engine most likely dates back to 1980.