A hughes whiplash roller cam/spring package is hard to beat in a stock magnum engine.

my stock JY 91 LA318 whiplash roller cam engine is still scratching.

my 440 truck just got a whiplash installed. freakin awesome in a BB 440 truck.

just picked up a 98 5.9 360 that will be getting the 360 magnum whiplash roller for the w350

cheapest bang for the buck running Junk from the yard