Part of the decision is wether or not you like going around corners at high speed, stopping fast, etc etc. I had my car set up as a road racer when I got it around 1991. After a few years I put a 6-71 blower on it and used it on the street but mainly drag racing. I missed the ability to corner, so I decided to change it back to a road race car but add more power so I could accelerate quicker then before to.
If you want that 555, you can use that to. I put a 581 with a procharger in mine.
