@RustyRatRod ..Yes a friend bought these B1BA heads against my recommendations, because of the B1 and BRODIX tie-ins. They flowed over 300cfm on the intake side at .650" and crazy good on the exhaust, like 260cfm!!
Problem is: no header fits, and the closest thing OOTB is a TTI W-5 header and it still interfered with everything torsion bar or steering/chassis related. He was forced to go tubular everything and coilovers to make the headers work. Dynoed on his flat-top 408" stroked 360, using a mild REED cams solid roller it made over 650hp, which ain't too shabby. I believe I would search for W-5s or maybe investigate the Victor Edelbrocks...