I replaced an old aluminum 42T chainring with the stainless Surly. Now my back wheel sits forward enough that I might need to add a link to the chain. What I am saying is that the wheel used to be pretty much centered in the drop outs (not track drop outs) and now it sits way forward. Here is a before shot, I do not have an after shot.
My math is telling me that the OD of the chain ring should be the same... but I'm no math man.