Well I figured out what I was smelling. It's a combination of oil and antifreeze. The intake manifold gasket is leaking. After doing a search it seems that it's a pretty common problem. Not too hard to fix, but it would be easier without the supercharger. Rock Auto had the best prices. They had the Fel-Pro gasket set for $11 - the same one Advance had for $44. I got a plenum gasket too. Probably will get to it next weekend.