Gear suggestions please

I've waffled between 2.94/3.21/3.55. I want shorter than than the 2.76 I've got but would like to keep rpms around 3000 or so at 65 if possible.

I have 14” tires, 3.55 8 ¾ Suregrip, 3000 rpm = 60 mph. I think it is a bit busy on a long ride. 3.21 would put you in just below 3000 rpm at 65 mph depending on tire radius. Do the math, or find a drive train online calculator and plug in your numbers.

The early standard three speed cars used a 3.21 ratio.