Well I got a chevy 307 out of a 72 nova in my regal right now. I hear from some people that these motors can put out great horsepower, others tell me they are just sub par. The 307 motor has a cam, and a holly 650 on it. I am going to wyotech, and in about 9 months or so will be taking a performance engine class where I can do anything from some head work, to a whole motor rebuild. So I was wondering wether I should keep the 307, and do some wor to that. Or should I get another blown motor, or a block to do a total rebuild on, and if so what motor should I go with. I know I want to keep a small block in there. I was thinking a 383, or a 400. I don't know much about any of the GM motors, so I'm look to see what I got for my options.