'65 Barracuda drivetrain swap

Explains the fluid leak from the front seal of the tranny. I got the adapter ring from Charlie_S here for $20. Don't fault the engine too quick. Have you done a compression check? Do you see a lot of blow-by and puffing out the oil filler hole with the PCV removed (bad rings)? Blue smoke can be valve stem leaks (can fix w/ umbrella seals) or sucking oil into the PCV (simple fix).