Like Old Ray said. When I used a 90 Dakota frame under my 48 Plymouth business coupe, I used the Dakota V6 (a Dakota never had a slant 6 that I know of) motor mounts welded to a 1/4" plate shifted back about 4-6" (have to move the trans crossmember back the same amount as well). I kept the distance between the motor and the firewall (I also used the Dakota firewall) the same distance apart as it was in the Dakota and that allowed me to use nearly all the Dakota connecting parts on my coupe. If you use a Dakota steering column, you will probably want a double U joint for the steering column at the steering rack.