Yesterday, we bought a '95 Riviera with the 3.8L S/C engine. I was ready to pull the engine until I realized that the '95 was the last year of the Series I S/C engine with the M-62 blower. The Series II N/A started production in '95, but didn't appear with the S/C package until '96...... so I'll wait until the right one appears to get the improved engine, M-90 blower and ~50HP more.
The engine looks like a nice low-profile package with a high-mount alternator.
Wow, so you're pretty serious about this.. I am too but it I can't even think about it for a few years.