Best performing non offset Small block Mopar heads

'68cuda416 said
So I guess what your getting at is that every member on here could develop, check critical clearances and assemble a 1000hp engine and have ZERO ISSUES that is shifted at 8600 rpm.......SURE BUD.....

I gotta admit for a non offset head that’s a good runner. Is that a ProMaxx, Edelbrock, Speedmaster, or factory casting.