Glad someone posted this question as I am in the same predicament right now.

Labor day weekend I had to add 65 Lbs to the car to keep it out of the 9's at 2200ft DA.

I already have it slowed down with a loose converter and gear and when the weather really comes around in October I will end up with a couple hundred pounds in the car keeping it 10.00....

Really on the fence as to which way to go....