I'm Cummins swapping a '74 Duster, thought I'd share the progress.

Good luck 2 ya. Is there not a 4 cyl that might make life easier? Like a 4BT or something ? Kim
There is indeed a 4bt that would be significantly easier, but I just like the idea of a 6bt, the car came with an inline 6, so why not swap in a big inline 6 ‍♂️