I worked some figures for you.
Without overdrive and with 28"tires and 3.08 rears
70-2500
80-2900
90-3325
100-3695
110-4025
these are the figures with a .75 overdrive
70-1950
80-2210
90-2495
100-2772
110-3326
these should be close but if you want to figure it out for yourself go to www.randysringandpinion.com Click on calculater then on engine rpm's Hope this helps Keith

You only get one shot at life.
Better have a good aim!
Later Dudes
Joe