3-step metering rods? High jets?

360 with a 4bbl Carter AFB . . .
My carter strip kit from e-bay and the "bonus" eddy 600 I snagged for cheap are on their way. I was reading up in my carter tuning / rebuilding book to get a feel for things before going nuts. In the "fine print" on one picture they said that AFB carbs with dimpled metering rod covers have a 3-step metering rod installed and for these rods you have to use high jets. I haven't done anything to this carb other than tweak the idle mixture and fix the choke (bad pull off).

Is there anything I should know about this that could mess up my carb? I was thinking that I could just figure out what size "high jets" are in there now and install the same size normal ones from the strip kit then go on my merry way tuning with the regular 2-step metering rods in the kit. I figured I could also use the flat top metering rod covers from the eddy carb or buy some regular carter ones.
Am I mistaken?
I also picked up a used eddy air fuel gauge to help in the fine tuning process. Is this "narrow band" a/f gauge fine for my needs? I didn't feel like dropping $250 on a LM-1 wide band set up just yet.
Thanks!!
Author: admin