Brodix B1BA heads...

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Exactly. But I made something fit. A lot of rework,rebend, resplice, and adjusting with a BFG, and a receramic-coat. Not to mention the custom mounts. And oh-boy the scattershield and clutch linkage. All that and the guy rarely drives it and when he does; you guessed it, it's to a show. Since installed,I bet it's never been over 4000, even 4 years later,now.
They made 497 dyno-hp tho on a 340, with a 6-pac. Hyup he had to have that too.
hi. headman race step header fits stock suspension with a little tweeking . 69 dart 416 b1ba 904 has gone 9.80 136 3050 lbs. less driver full glass car only glass hood. have to carry weight to stay in 10s. trick to heads is move intake push rod. need offset rockers. then you can plug that big pushrod hole. and port finish . hugh difference. just thought i could shed some light.