I guess with Alfa now back in the US market with the 4C the OP may find servicing and parts availability a little easier than say 3 years ago. Then again, with Alfa dealer prices.....maybe not..... Regarding your question about how to get cars legal that weren't intended for the market, I am going to assume that the US is pretty lenient in regards to custom and imported car registration provided the paperwork is all in order? Australia is generally pretty good for this too as most states (including mine) don't have MOTs and therefore provided you import a RHD car (LHD built after 1978 or something must be converted by an approved vehicle modifier to RHD) or use aftermarket parts that don't make the car illegal (i.e lowering a car to a minimum height <100mm if its OE spec was above 100mm in height) then you are all good. You can mod the suspension, tune the engine, put in a bigger engine etc. and there are no issues with registration provided everything on your car would pass the basic regulations like minimum ride height and would stand up to an engineering assessment (which never happens anyway). Hence why I feel sorry for some of our Euro members here, worrying about MOTs etc. when I don't have too