I went with an ATI 8" Treemaster I believe. It stalls exactly like I asked. Go with 8" if you can, even though the stall is higher, it slips less at the topend than the 9.5" 3500 that I was running. It's about $900. The car is much more reactive now, it pulls the front tires 2 to 3 inches on a good pass.
