75 Dart front clip to 69 Cuda

I'm sure it can be done. It's only a bunch of steel and if you get the torsion bars correct everything else will fall into place. But I hope it's cheap because it's going to be one bastard of a car no one else would want. Good luck getting it insured for what you'll have in it.

Uh, why would it be a bastard of a car? If you swap the frame rails, cross members, inner fenders and radiator support, and kept the original ‘69 barracuda bodywork, it would look just like a ‘69 barracuda.

All of the frame rails, crossmembers etc are the same. Heck, even swapping out all of that stuff you would only lose one original partial vin stamping. Done properly it wouldn’t be a bastard of a car at all.

And for the OP, if you can do all that welding, changing the bumper mounting locations on the frame rails should be a piece of cake!