Best performing non offset Small block Mopar heads

There is a 'wizard' that seems to get a lot out of using junk parts. His name is Dan Smith, I never met him but I see he's done a lot with reworking OEM SBM heads and flat tappet cam. (9.68@ 3200lbs). Last I read he was working a set of TF heads to see what he could do but that was over a year ago. Haven't heard much from him, hope he's doing well!