Kent KLS-1340A gear charts, although this would also apply to similar machines like the Grizzly G9036 and quite a few others that seem to have the same gearbox.
I believe that people are over thinking all the combinations, as opposed to looking at the available gear ratios and working backwards to what ratios you need to get a particular thread pitch. I have attached gear tables for both imperial and metric, basically just about every pitch is available using the gear selectors setup as either imperial (direct drive X:127 and 127:Y) or metric (X:127 and 120:Y). So if you wanted a 27 TPI, you would use any two X and Y gear combination that had the same gear number of teeth (i.e. the set used for metric 42 to 42 but both driving the 127 tooth gear) OR 48 tooth X input and a 32 tooth Y output on the 127 tooth gear, the gear selectors are set per the chart. The PDF is searchable, so just put in the pitch number you want to 3 decimal places "27.000" and search the table. This also applies to the metric, so say you want a 0.700mm pitch, there is only one combination which would be a 44 X input to the 127 tooth gear with a 55 Y output to the 120 tooth gear. This assumes one has a full set of gears per the gear charts shown.
You can fiddle with the tables to look at other gear combinations, but the easiest thing is to first figure out what you need and then make a simple table that works for you. I just use the spread sheets to look at the raw data and if additional combinations are needed. Like I said if you know the factory pitch, and you want a new pitch not listed, just figure the ratio relative to the factory setting and what gear combination ratio gives the same ratio.