well we can do it at sidewinder you can call and come in and we can talk about price it will take us a few day's to track down part's and price's but so far with the 420 turbo kit's we realy havnt seen that good of a result...not saying that it a crap thing to do but the people we have with them arnt very happy with them....but that's just from my end if you want give a call
727-540-0059 maby we can help or at least you can get an idea of a direction to go we just finished a 420 N/A build for n2o we arnt big fan's of the 420 but we do work on them but at any rait give a call and get some info
art