Im putting my 4.10's in my 5-Speed sometime within the next 2 weeks. If u want to wait till then ill let you know how it is. There are charts out, search for them(sorry dont have time to find them for you right now). Some have said going from 3.55's(stock) to 3.93's are sorta pointless since it is not even a noticeable improvement, where 4.10's are really really nice for getting off the line. They also only up the RPM's by about 500 when cruising on the highway. I think the chart said something like 85@2850 instead of 85@2350 which is stock, my numbers could be totally wrong but its something like that. I know it is not a serious wear and tear on the engine, guess just how much shifting you will like to do due to where you live. Im going ford gears by the way, just waiting for my boy to give me a day to install them.
-mike