dddd

I don't like to go to the trouble of setting up a bike without paying attention to the dropout parallelism and general good fit to all of the parts.
So even if the axle spacing were to be kept stock, I still examine the dropout alignment visually, and correct if needed before proceeding further, espacially with these Varsinentals as they seem to more often be out of alignment.

Another consideration is that many of the bike-boom bikes with non-Campagnolo (and generally lower-level) parts groups is that quite a few 5-speed wheels already have room for even a normal-spaced 6-speed freewheel.
Just look for the humungous gap between the smallest cog and the inside of the frame dropout, and if there is more than 9mm of space then usually a 6-speed freewheel is a go.
An Ultra-6 freewheel usually works if there is 6mm gap (where a modern chain usually needs at most only 3.5mm of space between the smallest cog and the inside of the dropout).