440 Source Head Opinions?

I bought three sets of heads from at the time Brandon (440source) two complete stroker kits, American made aluminum oil pan, oil pump parts, valve covers that are going on my B1 engine, a set of pistons, and probably some things I’m forgetting. At one time Brandon planned on casting 440 blocks and I was on the list for two. But that never came to be. I ran 8.40’s@160mph with his rods and 9.60’s@156mph with his stroker kit.
What heads did you use to run 8.40's?