Highest flowing sbm heads?

rumblefish360 said
I own a set of ProMaxx heads. No issues.
BPE is Bloomers heads? No issue. Don’t own a set. I see it as a niche head since it is not easily purchased by anyone. No disrespect, but I see it as a FB head since you need FB for the most part to get it.
Air wolf heads, similar as above but worse since he is mostly invisible and as far as I know, isn’t in biz.
The speedmaster head as cast hasn’t be shown as all that. Funnier yet, I read guys getting them thinking they’re going to turn low 11’s as cast or make 470+ lbs/tq and get upset when they’re slug slow.

I have gone 11.35 with speedmaster as cast heads running out of gear around 1100'. It was in a 11.5 comp 414 cu/in with a .590 purple shaft and 1 5/8 header's, 4.56 gears and a 28 tall tire. I bought them bare and just hand lapped the valves, no valve job. The converter was bought used and not built for mt combo. Same engine with trick flow heads and 1 7/8 header's and a converter/trans I got from pittsburghracer went 10.75 still running out of gear. I had a new converter built by PTC to try this year.