Here is a nice gear calculator that is on my site. It allows you to pick tire height, transmission and rear axle ratio. If you give me your transmission type and tire diameter or size. I can figure it up.
The program uses Excel if it is on your computer. If not there are plenty of other calculators on the web
https://www.12bolt.com/gearing-calculator.html


Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com