For a stock motor i would go with 3.42 first (this will give you the best of both worlds) remember your tranny has a deep 1st gear)....
For the converter I would talk to the guys at pro torque converter.
http://www.protorque.com/ (i have their 2800 rpm stall in my car (383 procharger car with 3.23 gears and i love it because its nice around town put when you punch it it will flash to a little over 3000 rpm giving you the punch you want for steet /strip ..... i blew up the vig on the dyno and will never go back to them this converter has took everything i threw at it (and will well over 600 pounds of torque) the vig did not last long under boost..
I see to many people putting in 3000 + rpm stalls on stock motors and trannys way over kill plus on a stock trannys wont like the added heat which will lead to a early death to the tranny...