Why replace the dropouts when you can get any number of ss chain tensioning devices that eliminate that need? I'm partial to the one Soulcraft makes. It doesn't operate on spring tension so it doesn't bounce around on you, and it's got a nice little lever you can use to lock it in its set position once you find the proper chain tension. From there you can flip it out of the way to remove the wheel. It's always good to use either a bash guard or ss-specific chain guard to stiffen up your cranks when you're only mounting one ring. My rim of choice would be the Sun ME-14. High qualtiy, relatively light, and backed by great people.