354-392 Chrysler Hemi. 331s and early 354s had integral bellhousings, so it ain't one of those. I'm no early Hemi guru though. Hot Heads has everything you need to build one of these beasties.
Heavy as sin, though; and a PITA to fit into an A body. :) For 20-50 bucks, though; it's money in the bank whatever you decide to do with it.
Eh, from 54 on 331s had the same short bellhousing. So it could be a later 331. To the OP, if you can get a closer shot of the front, we might can tell if it's a tall deck (392) or not.
