I had a piston oil groove issue. The oil ring groove on the piston was too narrow according to Weisco who custom made them. They made me a new set, switched to a Comp solid roller and got it back in. No more oil fouling the plugs and a batman smoke screen
. Engine runs excellent. Made 440 hp@ 5400, 475@6400 and 442@7400. Made great torque for a 355 ci - 458 lbs @4300.