Sparky,
I know you spent some time with the 608 lakester, did you ever notice that after a run there is a big build up of salt right in front of the rear wheels? You don't see it on Seth's car and I think the difference is that Seth's car is round in section which allows the air to pass between most of the wheel/tire and the body where as the 608 car is flat sided and the air is completely restricted from going between the wheel/tire and the body. How far away from the body do you plan to make your wheels?
As Pork Pie says "It doesn't much matter how you open the hole, it is all about how you close the hole"
Pork Pie Wendover KOA August '06
Rex