Sad to say but I have literally rebuilt every mechanical system, suspension, steering, etc and 1/2 the electrical on the 69 Cyclone. That said, it is still a "USED" car. I was a refusnik for cell phones until 2 years ago. Why? Because despite a huge effort and good money going into the car I knew eventually I was going to need to call for a tow. In fact second time out I exploded the torque convertor and trashed the trans. There I sat in a parking lot that I was able to push the car into. Technically a brand new/old car with 15 miles on the engine. Only person I wished I had gone after were the manufacturers of "BOSS HOG" convertors. Had I known my local trans shop makes billet units. Oh, if only. Think everyone gets my point. Even with a transplanted new engine, you are still going to have issues. Nature of the beast. If you don't believe it, find a new hobby.