1990 Peugeot Athena - Conversion and Restore

Then get the 130mm, no point in getting a 126mm hubs.

You'll be stuck with bicycle that have 120-126mm drop out, or go for the 130mm allowing a massive range of frame to go for (carbon fibre fixie skidder?).

What if he wants to use his fixed wheelset on a track frame ultimately, is it not better for him to go for 126 (less to cold set / respace?)?
Saying that, WI hubs seems to be dedicated to conversions so what I say here is not really valid maybe...