LSx Valiant Build. Take a look inside...

Pic above is of the millennial flathead. It has a turbo supercharger, twin ignitions with MSD, fuel injection. All modern stuff. About the pinnacle of flathead hot rodding.

People also forget that zora arkus duntov, the father of the corvette also designed and made Ardun OHV Hemi heads as speed parts for the flattie way before working for Chevrolet.