72 duster 440 swap

Hi there my name is Josh and I live in Western Montana having a little trouble with my rb swap into my 72 duster. Motor and transmission is in the car but everything acts like it's got to go back 3/4 of an inch to clear the steering and bolt to the trans crossmember looking for some advice and words of encouragement FYI all work that is being done is outside on the dirt in the elements