exhaust woes ......1973 340 into a 1965 barracuda

I have seen magnum manifolds in early A's. The steering shaft coupler needs to be changed to a u-joint, and the column outer tube needs to be shortened a fair bit (basically to the floor flange). There should be an old thread or two if you search the forum. If more than 300 HP or so is your goal, the Doug's or TTI headers are the way to go.