I have 7/16 D.T. X. 165 wall in my Hemi with Mopar (Edelbrock) heads with over .800 lift, street driven and strip with the RBRE rocker system with no issues shifting at 7600 thus far. The RBRE rocker system helps take out so much of the push rod angles and corrects most of the geometry.

rsz_20151008_074929.jpg
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.