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Anything under .510 lift you don't need adjustable rockers.Some may have run more lift with stockers but the largest I have run is the .509 cam with stock non-adjustable rockers.



I ran a .522 with stock rockers (and p-rods) and currently run a Voodoo .494/.513 with same.

ANY size aftermarket cam is a potential problem with non-adjustable rockers if the cam base circle is ground too small. Many of the larger cams are that way. I had a General Kinetics cam that offered very little lifter preload with stock parts.