'65 Barracuda drivetrain swap

Take the whole drivetrain and shorten the driveshaft to make it work. YOu will have to plug the smog holes on the 86 318 with little allen screws, but this way there would be no modifications to the original trans. Just hold on to the trans that you are taking out. YOu may even want to use the disk brakes from the 5th Ave. I did the same thing a few years back. Used a column linkage shifter from a 66 Valiant, though, in the car.