[marks73ta]

Matt, one thing I dwell on down here is cooling. If I stay with the rear mount radiator I will be making use of the added cooling that the long tubes will give. I may infact over cool and have to regulate the flow or cooling ability of the system. The thing is, I'm not sure I'll be out and about in this thing when the temps are at or above 100. I guess time will tell on how much I use it in the hotter months. But from late sept to june I'm sure I'll be getting as much as I can.
I am in total agreement with your thoughts on the high and low pressure areas of the car. My thoughts are the top of the trunk lid has a high pressure area right after the back window, much like the windsheild has a high pressure area right in fornt of it. Even GM moved the air intake grills on the rear of the corvair from the trunk (motor cover??) lid to the base of the back window. They would not have done that if it was not a benefit. The underside of the car back by the rear axle I'm not sure of. I had to cut an opening in that rear platform in the trunk because it had an angle stamped into it that intefered with my frame crossmember for the spring and shock mounts. But I think I'll make a new cover plate and close it off for now. See how the car works with the trunk louvered and be able to remove the cover later to see if there is any difference. I'm more worried about the engine heat coming down under the car and into that opening and causing a heat source in the trunk. I believe there is usually a high pressure area right under the bumper from the air rushing over the top of the trunk lid and curling around behind the car. But I think (hope) the fan pressure can over come that and keep a good flow of air coming thru the radiator.
And then, I could be completely wrong. Hope find out soon. Mark L