No interest in joining a pissing match, but with respect to the torque converter issue, save yourself some experimentation and shop for the 7inch driven pulley, and some 3100 rpm (white) garter springs. Also, the genuine Comet belts are pretty much worth every penny. And, Buy some bronze bushings. The 7 inch pulley does not overdrive like the 6 3/4 pulley. I was never able to get my bikes to wind much past 5000 rpm with the 6 3/4, but with the 7 inch, it happens easily. On my Colemans, I had to swap to a Predator 212 to get the 3/4 output shaft. This gains you some flexibility with aftermarket parts like flywheels, rods, etc. I would never trust a 100 dolllar chinese engine to hold together with a cheap rod and flywheel. Use an ARC rod, and billet flywheel. My hot rod
bike easily GPS over 50 mph with a built head and Isky cam (1.3 billet rockers, etc,etc) My Colemans have no suspension- they are a little older. My sons bike has a stock Predator Hemi, with 4 degrees of timing added, a .38 jet in the stock
carb, and a pipe with RLV muffler- The quieter of the two RLV mufflers. With the 6 3/4 driven pulley, this
bike easily wheelies, climbs anything, and tops out over 45 when it is cold as hell outside. Could be geared down. We ride these offroad, and were intended for that application. The hot rod bike is a handful. it will wheelie with brisk throttle input at anything under 20 mph, and pulls well beyond 6500. Wear a helmet, and boots.