No, that was the Z- cars if I recall right..
My SS/RS is stock with 3.31's and I say this b/c the Salesman that went through the option list explained the difference in gear ratios to me.
I just said, heck, stock 3.31's should be fine, good power, not like the automatic ratio's and a lot better gas mileage then the performance ratio's, plus faster, (but not quicker), on top end..
Btw, you might run a short wide tire to help keep you at a true 3.08 rearend ratio! I say this b/c my 406 didn't do all that good at smoking my great big old-fashioned L-60's b/c I think the effective gear ratio of my 3.31's was more like the 3.08's.
I did use ta love rolling her out of the hole and hazing the big suckers through first gear, (M-20)!!!