Identifying a 400 flywheel

[Jimal]

Originally Posted by Old Truck Man

Yes the aftermarket Rock auto or napa flywheel is available for the Small block 400. However its not balanced the same as a 454 big block flywheel. Now I could be wrong however its my opinion that GM never produced a stick flywheel for the small block 400.

It wouldn't be balanced for the 454. The part number is a GM part number, and I've read elsewhere that the 400 was offered with a manual in the 1970 Monte Carlo. They list a bunch of other applications, but as long as it is for a 400 I'm fine. The pictures I've found online have also shown the counterweight.