Slant 6 to smallblock

The Schumacher mounts are great for the spool type k frames. Hopefully its a disc car, but probably not. Regardless, I wouldn't swap k's.

Torsion bars are even a maybe as some slants had the same bars as v8 cars pending accessories. Im sure you know but trans is different, and a 7.25 is not going to live long behind a 408. So add a rear end and driveshaft to the list. You have quite a parts list ahead of you, so the swap mounts are deff the way id go. I ran the exact schumacher mounts you need deep into the tens with my stock slant k frame and torsion bars. Ran the bar numbers and they were the same as a 318 car if I recall.