I was told when I bought my Indy head kit that the Indy rockers were not good for over .600 lift. I went with Harland Sharp 1.6's. That is the only brand of roller rockers I have ever used.

'33 Plymouth 5 Window Coupe Blown Aluminum HEMI w/bolt ons (under construction) '69 Chrysler 300 Convertible 375 HP 440 '71 Plymouth Duster 360 W/EFI (Wife's Ride) '12 Ram MegaCab Dually 6.7 Cummins