I have 2 cars with the centerforce dual friction in them. A 71 440 +6 Cuda and a 528 CI Hemi in a 69 Super Bee. They have been in the cars for several years and have always gripped tight with no chattering. The overcenter spring will need to be removed and the pedal is lighter than the long style clutches. I am very happy and I do beat on the cars often, Have not had any experience with the zoom clutches in the last 30 years.