I saw a 8 HP gain switching from Smith Bros 3/8 x .083 wall (I ordered and paid for 3/8x.120 wall pushrods rant) ball and cup to a set of Manton series 3 3/8x.120 wall pushrods at 5000 RPM and up to 7500 RPM up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)