Save youself the time and money. Sell the frame you got and buy mine.
I have a Lonestar stlye chassis with single live front arms(chrome, lots of chrome) frame weighs 18lbs and ran in a Banshee that was one of the fastest 350's out there. Ran 2nd fastest time with John Lorio on it in 2005 PS race. Has ran a best of 7.11@75mph with my 175 rider and 7.05@77 with Donnie Diedo. Will guarantee it will run sub 4.0 with 150 lb rider or less.
If you are looking to just start and you do not want a big motor, this bike is for you. I will sell chassis only for $4500 which would be EVERYTHING except motor. Bike weighs 238lbs and has many lightened part, aluminum/titanium fasteners. $7000 with motor. Was in Sand sport Magazine and I have the article/magazine.
VERY negotiable but will take CASH only! Will part out as well. It Literally has the BEST of everything, K&T was my sponsor!