I've put together quite a few but have been "out" of bikes for about 10 yrs now, be sure and check the laws in your state about what it takes to get it legal when done ie #'s and paperwork for eng, trans, frame, etc. It's hard to go wrong w/S&S motors, stay away from the taiwanese parts they are junk. I would look for a frame w/large tubing, and go no bigger than a 200 tire I may catch some grief over this but those huge tires unload the front and just don't handle that well. I always ran open primary,kick start, hand shifters, I realize that may not be popular now but they were simple and simple is easy to fix, and they're light and clean. PM and GMA is good stuff, make sure your front axle is higher than your rear, raked tree's handle strange get your desired rake in your neck, don't discount H-D parts they are good as any. Don't preload anything, use locktite and fine pitch bolts, shim your motormounts, plan on spending more than your thinking on, good luck.