Dennis:

The air jets are the large cylindrical jets that fit into the carb top. You removed them to get at the mixing tubes. Smaller number in primary and larger number in secondary. If your air jets are flat and fit flush to the casting, not the large cylindrical stand-up style, they may have been replaced at some time. Either will work, but I think the tall style is more efficient and less likely to plug with the crud that collects on the carb top.

The main jets are the larger of the three in the fuel bowl. Again, smaller number in primary and larger number in secondary.

The last jet is the transition jet. It is the smallest of the bunch and can go only one place, the small threaded hole next to the secondary metering jet.

If you need mixing tubes (emulsion tubes) then you may need to scrounge some bone-yard carbs to salvage parts. Not a bad idea regardless...

230/8