Haz, I put a 4:11 R 180 from a 200SX in mine. Loved the acceleration, especially in 3rd and 4th. Then I decided to replace it with a 3:54 for lower rpms at higher speeds. BIG mistake. Way too much shifting in the canyons and twisties. So, I will go back to the 4:11 when the garage floor warms up a bit more. Yes, the rpms are higher with the lower gearing, but I don't drive it at those high speeds over 90 much any more, and I do drive the canyons and twisties. My friend, Kenny, has a 3:90 R 180 from a Datsun pickup front axle and I can pull him just barely. Some on here have done the Subaru LSD 3:90 swap and are happy with it, but it possibly involves new half shafts and adapters...too much for me. Just sayin'
Cheers, Mike