I just bought a 304 2v. I was told the motor came out of a 1970 javelin, and It was the orig. Is this possible? I thougt 72 was the first year. If so, does it have more horse power?
2nd. question. Did the lower end on 304, 360, and 390 come from the same block? are the heads similar?

3rd. question. What cfm are factory 2 barrels. could I use a 500 cfm w/ a short header set up?

I would like to stay with a 304, and I think I can get enough h.p. using it. But I would like to know if any one has hot rodded one, and what they did. I dont want a drag racer, I am going for scca type road machine.