Yeah, the FE transplant deff. makes for a fun ride.
My 1972 Pantera with 427 Side Oiler
Pantera Performance did the conversion, one of about 8 that they did from what I can find.
Had to move the trans-axle back about 3" to compensate for the length of the 427.
This doesn't change the angle of the half shafts enough to matter, everything else fits fine.