I need to pick a cam soon for my 428 Cobra Jet. Due to low budget, I'm staying hydraulic. I'm eyeing the Crower Power Beast, Comp Magnum 270, Comp 268, and Comp Mutha Thumpr. I wasn't even considering the Mutha Thumpr until two weeks ago when I talked to a guy who is running one because I assumed it was a "all show, no go." Well the guy running one says he thinks it runs better with the Mutha Thumpr than with a Magnum 270H, which is what he had in the car prior.
My build is a 69 Q Code 428 Mach1 with 4 speed, 3:50 gears, Streetmaster Intake, FPP roller rockers, stock heads with minor clean up work, and flat top pistons with relief fly cuts for valves. Engine is at the machine shop now.