"The balance is different, so you need to retain the 300 flywheel."

Can you explain more about the difference in ballance? Would that affect me putting a AOD from a 5.0 Stang behind my 300.

Steve Wyatt
1936 Ford highboy PU 300/C4 Ford 6
1957 Ford F-100 300/AOD Ford 6
This is one inline engine junkie that bleeds Ford blue.