Thoughts on swapping a slant 6 with a 383

No center link changes necessary. Column shift MAY work with B-body HP manifolds, but not the '67 440 manifold. You can make your own mounts. Heater blower motor fits fine with an RB (with stock valve covers) and fits great with a B block. Power steering fits fine, just make sure you have the 90 degree pressure side fitting for the box.