Run at least 10 gallons if you can and go with 1/2'' valves and line. Even if you dont want it real fast you can slow it down with fill controls and adjustable mufflers off the dump valve. This is better than you throwing in some 3/8 or 1/4 and having to redo the entire set up because you want it faster. Also look into nitrogen! Its the best thing you can add to your set up. You will be able to runs as much psi as you want and you never have to hear your compressors and thats the best part. On that note run at least two compressors, you should be able to get a double pack for a good price. Check out
Welcome to Forbidden Motorsports thats where i got mine.
Cant tell you anything about the setup on your car but if you need any advise on parts let me know and I'll tell you what i think.