I ran the MP .474 "street Hemi" grind in a 68 Coronet 383 Magnum 4 spd. Tall Wieand single plane, headers, Mp elec ign, windage tray, fully grooved Mains and a high volume oil pump, headers into Flowmaster. That hardtop was a bad *** ride in the 90s I never should have got rid of that mother I kind of got screwed out of it technically