I have been told that I hav 3.42 gears in my car now, if I move up to 3.73's will this make a noticeable difference in highway speeds? MPG? I know it should be quicker from a 0-60.

For every ying that's a yang... it won't be terribly noticable 2 maybe 3 MPG difference. The snap and grin on your face will make up for it though!

I'm guessing that you have a 6 speed stick with those orginal fears, the 3.42's, If your going to make the change I would highly think about a set of 3.90's you'd probably be happier with them. Just my 2 cents worth.

For every ying that's a yang... it won't be terribly noticable 2 maybe 3 MPG difference. The snap and grin on your face will make up for it though!

How true! I have a buddy with a Cobra who put I believe 3.90's in and its like a new car! 0-60 time is soooo quick!

Much thanks to you all, I like the sounds of this :D