One of the best paint jobs I had ever seen was on a neighbor's '70 442 W-30. He did a complete color change from red with black stripes to black with white painted stripes. He did it in his two stall garage, in the winter. The gaps were perfect, and the black you could see for miles while looking into it. The problem was he was a body man, and not a mechanical guy. He put the hood and fenders on before the engine went back in.... He refused to take them back off. Trying to stuff a 455 BBO and 4 speed through the opening left by the hood isn't fun, but it was his car, and his decision. The only damage was a very light scratch on top of one of the fenders, and a slight gouge in the hood insulation. It would have been a whole lot simpler if he would have waited.