don't go sr20 or bigger . don't get me wrong great motor . if its a track car you will prob find that most clubs run engine size classes . up to 1999cc engines , over 2000cc classes , ect . i have raced in 2000cc and up classes in a 77celica with a 2ltr twin cam quad throttle something (can't remember 13 years ago) . but its not fun going up against 5.7ltr supercharged crap . stick to under 2ltr and build something stroked to crap (so they don't know) strong that wont pop . and have fun battling at the top , well at least not being lapped .