The TUET1009 version is 2.66 1st gear, .80 5th and .62 6th. The ratios are just about perfect IMO. I love mine. After a few thousand miles the Magnum shifts even smoother. You will love this trans.
2.97 1st is simply too short of a gear and .75 5th the power falls off quite a bit upshifting vs. the .80 version. .50 is a stupid tall overdrive.