Aero question/theory

[Motorcitydak]

I am building a '68 Charger, its a little more aerodynamic than a brick but thats about it. I want it to be much better than that obviously. I have been thinking about the design of the rear end lately and think I have a way to eliminate the horrible negative pressure area above the back glass that these car's are plagued with. This was addressed with the '69 Charger 500 by using a flush fit fastback type of rear window plug along with some other things. I think that that looks alright but I really like the rear window and stock sail panels. Here is a pic of the back end, this is not my pic, just one i found on google



My idea is to use brake air ducting to make vents in the sail panels (the triangle pieces on the sides of the windows just in case you dunno). I could make vents about the size of the sail panels and put maybe 2 hoses on each side that would be vented from either side via a scoop, probably on the vertical sides in front of the tires. I think that this would eliminate the negative pressure at the back window, reduce lift at speed and actually allow a rear wing to make me some downforce. Or should i put the vents in the dutchman panel? (the horizontal panel behind the window) Or both? What do you guys think??