Kingkenny383 I don't know what your problem is but I run the numbers for you.
60' of 1.67 = 12.01@ 110mph 1/4
7.00 on 1/8 = 11.09@ 119 1/4
106 on 1/8 = 10.16@ 130 1/4
So as you can see the numbers are not close so maybe something like your converter is a little to loose an need a little more gear in the rear. JMO.