Will a 77 Charger 360 fit in a 65 Valiant Slant Six Painlessly?

Hello All,
Looking to replace the Slant. Would like to put a 360 in it. I found a 77 charger with a 360 that is in a complete running car.
How much modifications am I looking at to make it work?
Will I need different motor mounts or will the engine line up? Probably will use the transmission from the Charger.
Will everything fit without cutting Sheetmetal or welding new mounts? I probably will need a different drive shaft too.
I realize the Charger is a B Body and I'm trying to put it in a A Body
Thanks in advance.