Click "tech info" on the BDS site for cam recommendations.

Click "dyno tests" at the top of this page, then click Chevy tests, scroll down to the test on a 383 with a Weiand 6-71, 690 horsepower. If that won't convince you to buy AFR heads, nothing will. Also check out the cam specs they used.
http://www.airflowresearch.com/