I keep it no secrete that I run 450f / 650r springs on my car. But you need (must have) a really good shock to control the rear rate or she'll just bounce.
If you're worried about picking up that inside rear, go smaller on the rear bar. But I'm in the camp that for a FWD car it's not a huge deal. I'd rather keep it on the ground, but I wouldn't freak out about it. Anyway, 10k/10k with the 25.5 hollow rear bar seems firm to me for a DD but should perform well. I tend to go softer than most so I might have ended up with 8k/10k (or maybe 8/9) with a 19mm rear bar for your uses. I do not have a ton of experience with the Mini though. Have fun and keep us posted. - Andrew
Well i spoke with AST and they recommended i dont go any higher then a 550/550 until i get a rebuild. I ended up going with Hypercoil mainly b/c of availability, and also talking further w/ Vorshlag (who vendor for both). They should be here Wednesday and will be installed that day, and will have a good test of the performance next weekend at SW Div #1. Pretty excited about everything.