I would just take all the carbs, and all the spacers, haul it all down to Jakes, strap it down, plug in the O2 sensor and let it rip.

Let the best combo win. Done.

That way you'll know if A/F is in the ballpark with the best carb and spacer combo too, so there won't be any need to mess with changing jets at the track anymore unless the temp takes a fairly big swing.

When you get to the track prepare to change squirters, probably go larger but not always. I got tired of changing them and bought a drill set...