I have heard of people doing it with the 4 cyl cummins but never the 6 its pretty long I am sure you would have to move the fire wall way back and to answer your ? I dont think those bars are going to hold up

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4