Proform rockers
Indy off my 360-1 headed 408.. not a lot of spring pressure or ran at high RPM ...theres a reason Indy no longer offers them . When I spoke to them they suggested T&D of Harlan Sharp as a replacement .. I have since sold the motor
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I ran my 1.6 Indy rockers for five years on a .650 lift solid cam shifting at 6700 rpm on every pass. As far as I know they are still in use.
