Gear Ratio Help!!!!!

[l_and_t_reproductions]

I am looking to upgrade to a ford 9" (spare the debate on which is better 12 bolt v. 9" - that decision has already passed ) but need to decide on a gear ratio before I can make the purchase. Can someone help me with what ratio would be best?

Car Stats:
I am running a 4L70E/LS2 combo from a 2007 Trailblazer SS donor with no mods - in a 69 camaro with a curb weight of ~3400lbs.
The stock trailblazer used a 4.10 gear but I think that may be a little much for the camaro given the weight difference (4700lbs v. 3400lbs) and the fact that the car will be 80% street and 20% track (hopefully!).
I have read that the stock motor/trans combo has a 2100 rpm stall.
I would like to have a cruising RPM of around 2200 - 2400 but I think that equates to a ratio in the neighborhood of the 3.40s.

What does everyone recommend?