.650ish is the largest I had run on my old stock iron Hemi heads in my little ole +.030 426" on the street. It was good for a 10:17 in my old combo.

Mopar aluminum Hemi heads now with much more lift than that on my 528".

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.