I will refer you to East Coast atv, for they build some of the most magnificent motors and set ups on the dirt and street. They just finished my buddy jarron's banshee motor, it runs a 10.99 at 115 mph and they are saying it will run faster when he gets the launch down. If anyone out there can help you it would be the guys there, and they have a lot of other nice products, bought a few things from them for my 07' 450. Also yfzcentral.com those guys are very helpful and there are a few boosted guys on there that may be of some help.
_________________________
00' Si-mahle pistons and scat rods awaiting installation
95' hatch b18c1 turbo