At Dustin's it's bomb. At Brandon's...I'm not so happy with it. But I'm not quitting. I think the solution there is, well, see below:
Decouple the slipper. There is a time and a place for everything, and this is it. You have two options - either search this thread for "pin modification", drill the top shaft and modify the slipper back plate OR order these two parts:
http://www.teamassociated.com/parts/details/91180/
http://www.teamassociated.com/parts/details/91188/
If it pushes too much, switch to either 5k or 7K in the front diff. And while you have the rear trans torn down, throw the idler gear away and put a new one in. The coupled slipper makes more grip, and puts a ton of load on the rear transmission - the idler gear is the weakest spot.