i picked this frame up a couple months ago on c/list for 40.00 can anyone tell me what it is? i currently have 2 engines in the works one is the clone pictured on the bike with honda 18 pound springs a header and a 90 jet. next is a 5hp briggs dual bearing block ported, cam, and large tilly. i still need to pick which tilly. thanks to anyone who can help identify this bike