I should have been more specific, the bearings are the brass sleeve type with a spreader slot in themIt depends on the bearing type. Angular contact bearings are meant to be used in pairs, opposing each other to take up axial play. They must be oriented correctly. Tapered roller bearings, the same.
A simple ball bearing should be able to be used in either orientation with the exception of possible seals.
I wouldn't thinks so either but everything I have read specifically says to make sure front stays front. Just wondering why.Aside from any lubrication grooves or holes, I don't think the orientation would matter.