After Lofgren won the Royal purple Hemi challenge, he parted out the engine and I bought the heads. I put them on my red F.A.S.T. GTX. The intake valves are very flat on the backside. The late Glen Knowlton did all of the head work on them, he was a genius. They flowed around 420ish, but according to Glen the more important thing was the outstanding flow at lower valve lift numbers. The exhaust side flowed 315. I still have those heads laying around here somewhere.

Regarding that contest, according to Chuck the rules were very clear about displacement. When so many of the entries were found to be cheating on the displacement, or else they never read the rules, the organizers just let them all run anyway. Chuck was not happy about that. Then they made up some crap for the article about a misunderstanding of the rules.I'm so glad that Chuck won it because he was about the only one that was legal. You can probably reach him at KTRE. Knowlton's thunderheads racing engines.