help needed

Hi
need some help please,
i'm from israel , in the 70' we had a lot of darts/valiants but now its very difficult to find mopar parts or cars here
i found 71 swinger that original eas 3 speed with slant 6 and 8.75 rear. the man that i bought the car from tried to swap to gm engine with 5 speed trans(nv3500)
he cut the k frame and swap to front rack and pinion from 940 volvo ......lol
now i want to change it back to the original steering setup
i found 318 engine
my question is - does 75 k member fit 71?
if i will use a833 from truck is the tail housing is the only thing that i need to replace?
thank you for the help