On the related topic of drag racing, Everett Hatch's "Big Bad Clipper" ran a best of 97.75mph 1/4-mile at a weight of 4575. That is 338 rear wheel HP which is at least 400HP at the flywheel!
http://www.1956packardpanther.com/PV8C/HRM195708A.html It used a 352CID with 2x4 Carib intake and carbs. The only hot rod tricks in the engine were an Isky E2 camshaft (256/256, .420/.420 solid lifters) and "home brew" ported cylinder heads. From my experience, I'd say ol' Everett was a pretty good head porter to get that kind of HP out of the 352.
Also, using a modern profile (computer generated) hydraulic "bracket racing" camshaft instead of the archaic E2 would probably be worth another 40-50HP.
Craig
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