It's nice you want american but for my money I'd take the honda motor in a heartbeat. If you ever been inside one they are neat. The fit and finish is far superior to the briggs I remember with the splash oiling thing what a joke. There are plenty of honda dealers around to get you parts. And you wouldn't have near the vibration. The Briggs is fine at what it does, run at one speed with a governor setup. Over rev one a few times and that crank will come apart like a cheap shirt.
Well, you've got the right handle, jokesonu, if you believe everything you just posted. Honda's are a superior engine but they also use the splash oiling system and are governed like a Briggs. I over-rev mine regularly with no problems. In fact my two Briggs and Stratton motorbicycles just won their class at the Willow Springs race last Saturday. Very durable and capable engines. I own Honda, Briggs, Wisconsin, Lauson, Faribanks, Fuller and Johnson, Maytag, Clinton, Bean, IHC, Cushman, Whizzer, Tanaka, Kohler, Motobecane, Economy and a few other engines, so I know what I'm talking about. What I'm trying to say is that there's a lot of choices other than Chinese that are from democratic nations. A determined builder can do without a kit. Lots of us have.