3.90 gear in a stock rear end?

Who makes a 3.90 for a stock rearend? I have a 3.42 now. But I want a 3.90 for more kick and something good for the highway.

AFAIK, nobody makes a 3.90 for the factory 10-bolt. Your options are 3.73's or 4.10's (4.10's being a popular choice among the M6 crowd:thumb: ).

I think it may be in Ford 9" diff's that you can get ratios such as 3.55, 3.70, 3.90, etc. :think:.