Our wagon has 3.73s, 27.6" tall tires, and a 4L80E with a 3800rpm 9.5" lock-up converter. N/A this is a sub-optimal combo for the cam's rpm band and only somewhat satisfies the overlap (6.2°) - but, on the bottle it should be perfect. For highway driving and putting around it is nice.
The Monte is going to be running 4.56s, 29.5" tall tires, and a 200-4R with a 3000rpm 12" lock-up converter. The cam is a stock 2001 LS6 unit and has a tonne of negative overlap, so it will drive just fine in all conditions. Will it buzz on the highway? Sure. But, it will trap at peak engine speed at the track. I am willing to drive slower on the highway as a small sacrifice.
I don't suggest you compromise on gearing unless you like being disappointed or have one hell of a mitigation strategy.