Reality Check what engine.

[rich weyand]

Keeping it simple, then keep the stock cam like MikeB says. That will also keep the 3-year warranty intact on that engine. BTW, that engine was $100 more last month, so the price varies around. This is about the lowest I've seen it in the last five years.

Also keeping it simple, get the pre-set-up Qjet from Sean. To the price of any other carb you have to add the price of a good AF/R meter (about $300) so you can tune a stock-out-of-the-box carb to the numbers. But Sean knows what he's doing setting up Qjets to specific engine configurations. There's a wait for an SMI carb, because he will ask you what you are running -- engine, manifold, cam, exhaust system -- and then tune it specifically to your setup. It's not just off-the-shelf.