WELCOME PILGRIM!!!
Glad to have you on board. You will find this to be the "Treasure of knowledge" for the Turbo-Regals. As a community, we support each others addiction to "Boost" w/meth, corn alchy or c-16! We will offer suggestions for immediate needs, but you must spend a lot of time reading to acquire the knowledge to keep the "habit" going w/o self-destructing! (Boost, along w/it's co-hordes, knock and detonation, takes no prisoners. They kill w/o mercy!!! (And you don't want to become a member of the "DOTC" club![drive over the crank]
You will find a list of supporting venders at the bottom of the forums "table of contents". Many parts can be had in the "parts for sale" section, also you can post for parts needed in the "parts wanted" section. (Keep in mind, "stuff" is expensive!) {If my wife knew how much I have in my car, she'd sell it and buy a new house!!!}
May I suggest(mandatory) items first.
1/upgrade the fuel system as has been stated, (looking to your long term goals, i.e. 400hp, 600hp, etc.) Do the research, ask questions, and then decide. a/fuel pump/s for type of fuel you plan to run. E-85, 93+alchy, etc.
2/Hot-wire kit for fuel pump/s.
3/some form of scan tool you can use while operating. Such as a scan-master and power-logger, xfi, gen-7, etc. These will serve for early warning and longevity.
4/Read, read, read, and did I mention read.!?? Make decisions only as fast as your knowledge will allow. Check other board members signatures for your desired performance level, calculate the cost, as the quicker you want to go, there are unforeseen added expenses for the uneducated. Example:The transmission is the weak-link in the drive train. I blew thru 2(the original and a new one, still under warranty) exactly a year apart!? May I suggest saving for a performance one? I'm currently running Lonnie's stage III, good to 1k hp. (he is owner of extreme automatics)
Again welcome and hopefully I haven't scared you off!?