speed-o gear

[stuch]

I have a 1962 belair with a four speed transmission t-10 ,411 rear gear ,five inch wide wheels,27 inch high 7.75 cheater slicks .How do I find out what speed-o gear to use to make my speedometer work proper.is there a way without guessing?:dunno :dunno :dunno

[JimKwiatkowski]

Stuch,I got this link from Fatride,but I'm not very good at Math :dunno I used the formula at the F!!d dealership,add or subtract 1 tooth for every 3 mph over or under.Just follow someone with a accurate speedo.

http://www.chevelles.com/shop/speedo.html