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Yep just spring it apart and put any 130mm hubbed wheel in. Wheel/cassette alignment shouldn’t change much, but if it does you can normally recentre the hub/wheel with the screws on older style slotted dropouts provided the frame has them (most older frames do).
Plenty of older frames will take 130mm. Alternatively cold set (permanently bend) the dropouts apart out so they stay at 130mm then get lbs to adjust hanger so derailleur sits straight (again should hardly change but more of an issue with more speeds).
jupiz-
I would advise to always coldset to 128-130mm when using 130 mm OLD hubs and adjust the dropouts so they are 100% parallel at this distance. The reason for this is in my opinion not the ease of wheel changes (because as said, you can put a 130mm wheel in 126 frame without much problems) but the fact that with the wheel in the frame, your dropouts should be 100% parallel to eachother. If you don't align the dropouts properly, this will cause unnecesarry stress on the bearings, which will cause play after some time. At least, that's my experience with neo retro builds. Correct me if I'm wrong, I would be happy to learn.
Flandria
Ah right. There are older (early / mid 90's?) steel frames that were made for 130mm hubs as well though, right? Maybe for 8 and 9 speed then.