spirit of 76

I'm not worried at all,I'm thinking to drop the original k frame and replace it with one I can modify for a BB, and at a later date rebuild the 6 mount it on the original k frame and save it,I know I would have to change the torsion bars and the rear end and do brakes I would save and rebuild those item as well, I'm not sure when I will start all this,I guess maybe when I think I have all the info and opinions I need.