Hopefully all those trucks you're looking at have limited slip too. I've noticed that the vast majority of the 3.21 trucks don't have LS and the other way around for the 3.92 trucks. If the deal is just too good to pass up you can always add it later. I've had both and honestly not having 3.92s would be a deal breaker for me.A lot of good points going both ways. I went to a closer dealer today and told them exactly what I want and with the 3.92. He is supposed to call me tomorrow and let me know what he finds. If he can find me one and cut me a deal close to the good deal on the other one, I'm going to go with it. I'm thinking it will be hard for me to get him down though because the other one with the 3.21 is a dang good deal. However it's about 250 miles away as well. I'm just going to see what I find out from this local dealer and then go from there I reckon.