Big carb (Quick Fuel 850) on a small engine?

For street use, bigger isn't always better. Tuning it will take some experimenting, but it can be done. I've always run the Holley 4779 4 point idle circuits on my street cars & race cars. But, then again, I've been fooling with them for about 50 years & learn something new everytime I build one. No two carburetors will run the same out of the box so that is where the tuning curve comes in. I'm not saying don't run the 850, just be prepared to tune it using plug readings, performance (butt dyno) & reading the plugs. In the end, you can brag to your friends & maybe help them with their carb tuning.