Trick Flow 440 heads, The Real Deal?

Old Man Mopar said

Well, I'm impressed with his results on a 48 year old shortblock that was rated at 375 HP stock. No mention was made of the type and size of the camshaft though. Whatever it is, it is evidently still streetable. Bolt on a set of OOTB RPM or 440 Source heads and see if he can even get within 50 HP of that.

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I've done 550 HP @ 446 ci,Eddy RPM's, valve job only, small hydraulic roller, 10-1 comp. And this was without dropping oil or cold water, fresh air, open exhaust dyno "aids".

I just think that a full CNC 240 CC port with a big valve and modern chamber should go well over 600 HP and maybe 650 hp + easily is all. But that ain't gonna happen 'till somebody relocates the valves. J.Rob