Comp Cams 42-600-9

Olds; Oldsmobile; Cutlass; Cutlass Supreme; 98; Calais; Ciera; Custom Cruiser; Starfire; Firenza; 88; Rocket; Rocket 88; Vista Cruiser; Delta 88; 260; 442; 307; 350; 403; 400; 425; 455High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.Whether its f