Correct 70 SS396 Casting number

[Caseys69]

For a 70 Chevelle TH400 built 03D what would the correct block and head casting number be for a L34?

[Rixls6]

3969854 for the block, and the head casting will end with 290.

[Mr70]

Block would be casted #3969854 with 2 bolt main bearings,not 4 and stamped CTW for a TH400.
Heads will be cast #3964290.

[Caseys69]

Thanks guys!