[onewhippedpuppy]

I've seen a few similar builds on bimmerforums, if you are bodywork savvy it's totally doable. I'm not sure about sourcing either the flares or the entire fenders to install, if there aren't aftermarket options it could get expensive fast. 5-lug conversions are really common so that shouldn't be an issue, and it's a good time to upgrade brakes/suspension. Personally I would swap in an S50/S52, they are cheap and easy to find and fitting one into an E30 is easy and well documented.