Gears...?

[Silver Stallion 2k]

Hey Guys, I know about gears and I've read alot of the posts. But I was wanting some more advice if you guys would like to share, that is. I'm wanting to up grade to either 3.55 or 3.73. I drive sometimes agood bit on the highway and through town. I don't want to kill my gas to bad and I dont really go to the track that often. Which One would you guys suggest. I know the 3.73s will make me go alittle faster than the 3.55s, how much of a difference is there? I'm also wanting to up grade my gears to make a LS-1's Nightmare. Did you guys know some of them come with 3.42s stock? Thats a pretty good diffrence from a 3.27 of mine stock. Right now I haven't raced one yet so I don't know how I would do, but I do know I can blow the doors off the LT-1 pretty good right now.

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2000 Gt Mustang(S.S.)

-BBK X-Pipe
-Delta Flow Flowmasters
-Home made C.A.I.
-JET Power Module

Loves to Beat Z's & T/A's