Y do say that? I doubt my sub 200hp 3.4 could brake it. I have a really good deal on some 3.73 with install kit but i don't want to have to wonder what 4.10's would have been like. and the only time i have the car on the highway for more than 25 min is to go to your shop. So if it ran around 2500rpm @ 65-70mph and i lost some mpg's so be it. (runs around 2100 with the 42's)

car feels nice, just needs little kick in the ass. I want to put the vigilante converter on there and its made to match the car, gears being involved in that right... so i want the 4.10 before the converter.

I would do the converter first. The stocker is pulling the engine iout of its power band. You might just get the kick you need from the converter.

You already have a little bit of gear in the car, the stall will help the car off the line and give you a big seat of the pants difference. A good stall and a good shift kit is worth as much ET as a set of gears.

When it comes time to do gears, just go all the way with it and do the 4.10's. It will provide even more jump off the line and keep the engine in the power band all the way down the track.