Opinions on heads please?

Mike, I'm impressed!..lol. I'd do just what Mike said, but a performance engine will use up that $3K quick. You'll need about $500 more to get a complete engine (you'd need a carb, headers, and ignition not included in the $3500). Not to change topics, but, exactly how fast do you want to run? 450 horsepower will get a properly equipped car into mid 11s. A car that is primarilly street doesnt really need that much, unless you want it. As power goes up, streetability goes down when your talking about factory sized small blocks. Power brakes wont function , and it wont idle well in gear with the cams you'll need for that power level. Not the best for a car that might race twice a year. Just a thought..