I have a camaro with a BBC that is backhalfed. It is 54% front and 46% rear with alot of torque 540cid. I finally sprung for a set of afco 3840 BNC shocks. They are double adjustable but the rebound side has very strong valving and it will control the car in a wheels up launch when it comes back down like you couldnt believe! You can control the up movement and the down like it was a different car completely. They are pricey but what a difference it made not upsetting the car when it hit the limiters so hard. I would suggest that you get a regular length coilover and make it fit your car. Travel in a shock never hurts, if it is to short.....then you can damage it if you arent right on with your first settings, I did that and had to send a 800 dollar pair of coil overs to be repaired after a few passes.