on stock lts with 4l60e’s between 3.73s and 4.10s ppl have seen the same times with the gears, just different gas milage, u dont want to go and throw 4.30s in it or 4.56s right off the bat, u will be plenty fine with 3.73s. sometimes higher isnt always better, u can run out of gear, or even over gear a car.
and a cam doesnt always ruin driveablity, it all depends on what kind of cam u go with. like the specs and everythign, i know of a couple of cars that are daily driven with cams, my car was one, and still will be one. along with sliverSS.