Have you thought about just doing the Gen 2 crank conversion? I am rebuilding 05 turbo right now (street bike not a racer) and going with a Gen 2 crank. I figure it gets me the best of both worlds A fresh Rebuilt Motor with the low and mid range torque that I have on my B King. don't have to replace the valves the way I would on a Gen 2 to run higher levels of boost. I should also get the benefit of the extra volume of exhaust gas spooling the turbo a bit sooner. From a budget standpoint I have the costs of rebuilding a stock engine , cost of the new Gen 2 crank and its installation roughly $2500