That's really tidy! :-) My brother's got an M30 (3.5 £50 lump from the 5-series) in his E30 Touring for an easy 200+BHP, on LPG too. He's been doing loads of custom LSDs for the E30, custom ramp angles to get them to lock more agressively - let me know if that's any use to you. For wheels you can't do much better than the 15" E30 BBS, and I've got several brake kits to stuff them with (inc 2-pot rear!). Also if you get the "52mm" front struts from a 6-pot car you get bigger/stiffer shock bodies (and stiffer springs). Two WMS customers have used the Nissan SR20DET lump from the 200SX etc, works well! Other swaps are the 2.5 24v lump, and the 1.8/2.0 16v "IS" ones, sometimes supercharged. Here are a few cars we've done the brakes on: Supercharged 320is: 325i race car: SR20DET track car: 2.5 24v track touring, epic photo this! 325i track car. Get onto the E30Zone to see what people get up to! :-)