I called B&M just to be 100% sure.
Part # 10230 is listed on their site for Mopar V8 internal balanced for 727.
They confirmed it is for Big or Small block, with a 727 or 904 transmission.
So, that is the one I need specifically from B&M.
Now, as I was searching other websites, (440 source to be exact) they list one for Mopar V8, internal balance for a 727.
I called them, confirmed that is is universal for small/big block and for 727/904.
More importantly it’s $39 (SFI approved) .The B&M piece is $112.
I think I found my flex plate!

Wally.