[hognutz]

my reading has lead me to belive they are very similar. your good to 700whp or so and after that is how you drive it.

if you stay on street ruber and drive the car moderatly hard you might be good to 750whp even touch 800. start launching on tire and it can be a coin flip.

I am not sure I would not even bother swaping out my stock ZL1 clutch for the ZR1 unit. If I get to point where I was making 700whp+ I willproabably put a 1000lb clutch in just to have good margin like the stock car did again.

if you want to really know I would call lingenfelter or katech someone who works with clutch packakes as they might know the exact differences.

my only knowledge just come from people modding cars on both platforms and the point they had to upgrade. they are similar though.