[MKS427]

Eric,
The gearing is different from trans to trans, so you will want to evaluate the rear gears too, or you will top out in first quick.

Assuming 26.5" tires
Toploader 2.32 1.69 1.29 1 3.55 or 3.73
TKO-500 3.27 1.98 1.34 1 0.68 ~ 3.08
TKO-600 2.87 1.89 1.28 1 0.82 0.64 ~ 3.27

Good luck.