My 67 coupe has a 1978 302 2V engine and a C4 in it and naturally I'm not happy with its performance. I don't want another dragtser but I would like more pep. I plan on rebuilding the engine in the fall and looking for options with the heads. Besides going with a 4V and a dual palne intake should I go with 289 heads or stay with the 302 heads. Also, are there any differences with the 289 and 302 cams? Thanks in advance.