vacuum gauge to solve idle issue

Not for what they want for property out there lol.
I should have some time friday to take a look at it. I thought choke too, but it had a credit card thick gap. I read thats proper gap?
Thanks.
Now see....you should have taken that job offer out here...then I could lend you a few carbs to try!!! ;-)

Seriously, I doubt a rod or jet change is going to fix your problem. While the carbs apart, blow every passage out with air, and check your float levels.

The surging seemed to stop after you did the first rev-up. Could it be that
the choke butterfly was just closed too far?