'71 Mercian, '72 Jeunet, '82 Jack Taylor, '13 Rawland
The only problem is if the original Tange spindle was asymmetric with an offset. If this is the case, then the UN54, being symmetric, will shift the crankset to the left relative to the Tange. If the offset is minimal, it may make no discernible difference. But if the offset is a few mm, that can be significant.
What SPB said. So a practical approach is to pull the drive side crank arm from the old BB, measure the spindle end to the cup, and make sure you get a cartridge that matches that key dimension. The non-drive side is less important, unless you care a lot about q-factor.