Hey, you are talking about a 30+ year old car, even if it is factory paint. The level of prep work depends on the desired longevity of the new paint job. If you just want to tape everything and squirt some paint on it and be done, then just 220 the whole thing and go for it. But from your concern about the level of gloss to the clear, I assume you want this to be a nice, long lasting paint job. If that is so, then I recommend removing all the bumpers, mouldings, and trim and stripping the entire car down to bare metal. Then you can come back with all new , up-to-date materials for a lasting job. I know that sounds like a lot of prep work, but the end result is worth it. Otherwise, you are risking a waste of time and money. I hope this helps.