[KMPrenger]

I think 3.55s or 3.73s would be the sweet spot in these cars. I wouldn't go any lower.

That said, I'm not sure I'd spend the money for 3.55s for my own car, but in you case it would gain you some of that low end back without compromising much on top end. If you can raise the limiter to 7,100 or 7,200 rpm you should be golden.

With 6 speeds I don't think having a really low gear is a good choice in as many situations as say a 4 speed auto or less. Heck, look at the new 8 speeds going into the Vettes. I'm just pulling these numbers from memory, I think a 3.06 or something like that is the lowest they offer and 2.52 or 2.72 is standard.