I used to run the iron rockers with a crane R280 roller, i now use the same rockers with mopar .590 but 6500 max now.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36