Been tinkering with my carbs and found 0.2mm thick washers. I've been experimenting with spacers on my needles. Since the approximate space between each slot or clip to clip is 1mm, I can use these washers to add 4 equal increments between each notch.
Initially, at notch #4 it was way rich, so I ran at #3, but someone, (5Twins), hinted that I should be careful and his advice was a taken. The plugs seemed too clean, so I put 1st, 2 washers on and it ran stronger, but still too clean.
Then went to 3 washers or 60% of the way to the 4th slot and it felt even better. Went up 1 one the mains or 132.5 and so far I'm very pleased.
Washers available upon request.
Oh, it's worth mentioning that I fixed the slop in my Pamco to create a more consistent firing point and set the timing at the more retarded "F" mark. Before making any changes in timing and carbs, I read the, "How to read your spark plugs". Very informative!
https://www.strappe.com/plugs.html