Don’t be afraid of the 80 shifters, with your background in racing, it would be a good challenge. I did some SCCA racing back in the day and started out running 80s at Monterey last year. Good group of drivers and some close racing. Look into Jon Ban’s Nor Cal Shifter group that runs in your area they have 7-15 karts at each race and he puts on a great series. The 80 shifter package is the best bang for the buck (my opinion) on the west coast and its expanding. Good luck.