What transmission do you have? If it is a regular 4 speed 2.66 1st, and you go to the OD 4 speed with 3.09 1st, that will take you from 14.0904 to a 16.3682 SLR.
But, with the OD ratios, If you shifted at 7000 (just an example), you would drop to 3783 at the 1-2 shift. The regular 4 speed would drop from 7000 to 5026.
