For those of you who are open to different experiences, first you might try getting "Performance BMW;" a magazine out of Britain. In the issue 66 March 2005, there is a great article on a 3.5 turbo charged E30 M3. But to make sure he gets an extra kick from the motor he had (and I'm just going to quote from the mag - page 45):
"But what if 350 bhp wasn't enough? Take a look in the boot and you're in for a shock. Even with the 3.5 litre lump and Garrett turbo, this apparently wasn't enough for the power-hungry Dips. Two big nitrous bottles are housed amongst the assorted ICE hardware, and it's all hooked up and ready to use at the touch of a switch in the cabin. Crazy."