I have a Ram clutch and had the same issue when it was new!! It would literally shake the car to pieces no matter how easy I let it out!!!
I called Race Parts Dist. where I got it and Neal McLean told me that most High Performance clutches require "Burning In" especially in light cars??
He told me to make several hard launches with 3000-4000 RPM's and try not to spin the tires (burn the clutch)......It really worked and after a year or more NO SHUDDER!!!
Give it a try...you may be pleasantly surprised??
Good Luck!!
Coosawjack
