383 runs like a giant turd WTF

My 68 Coronet had a 383/4 spd Magnum. A 383 will rev almost like a 340 but produce Big Block Power. They are not a joke. It was stock before I rebuilt it, then added headers, tunnel ram, MP electronic ing, MP street hemi cam, hi vol oil pump, fully grooved mains, file fit rings, MP rod bolts, baffled pan w/ windage tray, heads were done by ED Garlits, 750 Holley, double roller chain, and a few other things I forget.... I ran it over 7000 rpm w/ stock rods and pistons.....Almost got one out of a 66 C body the other week but the ford boy thinks he has a gold mine (rotted up, needs total resto...)