hey dakmat, at least you are tackling a drag car but in a drag race RC car, you don't want shocks in the rear at all. The front can have shocks but not the front. The rear end tires take the shock and load of the power and with shocks, it creates too much movement and you loose traction once the springs unload. What I did on one of my drag street cars was put a solid link that was the same length as the stock shocks and what a HUGE difference in the way the car launched. The shocks also react differently each time you make a pass and that makes it hard to tune the chassis because it will pull hard left on one pass and then hard right on another. With a solid end, you put weight where you need it and it holds right there and then that is when you can start to tune your engine for max power/ET.

Anyways, good luck with your build and post up your ET's when you run it.