I'd do a good fuel system, VMP 2.3 TVS, built T-56, etc. but idk what you want to do with it. That's what I'd do because it would have killer street manners but still be capable of mid 10's power wise and have $$ left over to buy a daily driver.
Honestly the FIRST thing I would do is get some practice driving it at the track AS IS, once you get all you can out of it that way go for more. WAY too many high HP cars on the street and track that under-perform.