I have used all stock 440 pulleys & water pumps on my hemi's on the street with no issues in the past. With everything you have changed/replaced & still having issue I am thinking it may be an intake leak/vacuum leak making it run lean or timing issues possibly?

1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.