AVS Carb is Kicking my A**

Next questions:

The primary jets that came out of the carb had a "shoulder" on them. The secondary jets looks just like the ones available today.

Is there a difference in the construction of the primary and secondary jets?

Also, according to a couple of websites, gas today is not the same as in the 60's and they generally recommend jetting up for a richer mixture. I live at 3500 feet so I need to jet down to lean it out. I thinking about sticking with the stock jetting and hopefully between jetting up for the bad gas and jetting down for the altitude, I might get it about right with the stock jets.
Any suggestions. Primary-.089 Secondary-.092 were the stock sizes. 16-164 for metering rods

Rod