Has anyone installed 3:42 gears and posi with the stock ST300 2 spd transmission? I was wondering how high the RPM will be during freeway driving say at 75 MPH. I've also called a few tranny shops in my area they said that going to a TH350 3 spd will not make a difference on the RPM...true? I was also told going with a 700r4 is better than a 200r4 because parts are easier to come by if needed with the 700. I found a shop that can install posi and gears ranging from 3:08 to 3:90. Any input will be greatly appreciated.