AZ or AW is going to be a better place to look for info. Once you wade through the "OMG, just do a 2.7T so you can boost it through the ass" responses you'll find a couple guys in the B5 section who have done the swap. It's very tight though, small engine bay. I love the 4.2, hell I'm on my second one now, but in a B5 a 2.7T might be the better option since you'll have the chance to do all the engine maintenance before the engine is installed. Less custom work and it's an application the B5 platform got from the factory.