You can do it. I will send you a 6-32, 8-32 and 10-32 tap and the correct drill bits to drill them. It won’t cost anything.
I can get you the brass set screws in those sizes if you can’t get them.
I don’t know if I just send you something as a gift if you have to pay taxes on it or not. I would hope not.
There are also very small number drills (60-1) that you’ll need. If you can’t get those, let me know and I will get you a set of those. If you look up the exact sizes of the number drills you may be able to use a metric drill that is very close. That would work.
You can use the drill bits as a pin gauge set if you can‘t get pin gauges.
Really this is very easy. We can walk you through it. Especially since you are an ocean and then some away, learning this for yourself will pay huge dividends down the road. Who knows…you get a handle on this stuff and maybe you can tune carbs for money where you are, if there is much of a need for it.
Your metering blocks may be 3 be capable but you may not have the third circuit. If there is a brass tube in each venturi then you have 3 circuits. If it’s not there, you have 3 circuit capable metering blocks but you aren’t using it.
If you can, take a picture, a close up of the boosters from the top so we can see if there is a small brass tube in there.
That will clean up a bunch of questions.
Once we get that sorted out, it will be easier to get you started on correcting your tune up.
I don’t remember so remind me, what ignition are you using and where is your timing?