I got mine done for about $400 including the gear and spedo gear. My Dad has a 01 Cobra and its gonna run about $1000 including gear and spedo re-recalc. I guess the Cobra is more involved and takes more time to instal.
Just to touch on what Travis was saying. I got my gears at GEF. The 4.30s are more expensive since they didn't keep them in stock. Those were $198. Team in Marietta did the install for $398. I bought the speedcal from another stanger for $60 and installed it myself before the gear install that way all I had to do was change the settings and drive home.
Hey 99GT also remember that Trent had a IRS axle adn you have a live axle. So his pricing would be a little more than yours!
Call Brandon and he can tell you for sure! Then if you want or have a chip or SCT tuner you can change the computer either way.
Just remember that you will have to change the computer with a speed cal or a chip or tune of some kind. I did not know that until after the gears, hell they did not know it until after the swap and I had to drop another 400 for the chip and custom burn.
MV Performance out in Statham has done all the work on my car. They charge me $275 for install on gears including all the fluids and stuff. You can buy the gears from gefracing like mentioned above. You will also need a speedcal or some sort of tune to correct the speedo and odometer.