Tom, unfortunately, there aren't many Alfas left in SCCA. Probably more in IT than anywhere else. I can't think of a single situation where an Alfa is classed to where a serious effort would lead to a Runoffs podium. The 2L cars are classed in E-Production as full-prep, and F-Production with significant restrictions as limited-prep. The last serious effort with a 2L EP car was Mike Cudahy's Alfetta. As currently classed, he could get to good FP times, but not run near the front in EP. I have considered petitioning SCCA to add 300 pounds to the current EP spec and move the car to FP. If they did, I could run my GTV in F-Production. It would still take a complete rebuild/start over to be competitive. But I would probably attempt it!
If you are just looking to go have some fun, IT is probably your best bet, in either the Spider or the GTV-6. If you are looking to win at a National level, you might want to set aside your love of Alfas!
Erik