My 1963 factory supercharged Avanti has one of these and they are still made today. I'm sure something could be set up for the xfire, however you will also have to mod the injection system to keep from burning too lean and melting down a piston or two...

http://www.paxtonauto.com/
http://www.proficientperformance.com/paxton.htm
http://www.jdsperformance.com/index....cat&inmake=all