Need help tuning Quickfuel carb

It’s tough to say if it’s lean or rich without a wideband o2.
I really wish I had one right now, I’ve tried jetting down and that hasn’t done a dam thing.
I have not tried increasing the main jet, and it would only take a few minutes to
Pop the bowl off and install some bigger jets.
I have some 68s on hand no 70s though.
I would have thought being 3500 feet above sea level would require everything to be leaned out some.
This carburetor came with 68 main jets and I was told to drop down 1 size for every 1000 feet increase in elevation.
So I dropped down to 65s.
Maybe running 18 initial and 34 total all in at 2500 requires a lot more fuel?
I don’t understand what’s going on here at all.
All I know is all these parts are brand new and it’s pretty ridiculous that with all these brand new parts something could be running this bad.