I went to Capital raceway a couple of weeks ago and had an absolute blast. I have a couple of questions for the racers here. 1). The tech inspector informed me that the radiator and intercooler had to be straight water which I didn't know; what's the best way to handle this, drain into a bucket and reuse or? 2). How much weight savings can be had with some racing wheels in the back instead of the heavy stockers; I see some run 15" weld wheels etc.? Thanks in advance. Bill.