Early swingarms had seperate side thrusts with cupped steel washers and a grease nipple at each end with a machined "scroll" in the ends of the pivot pin; Later ones had "Top Hat" bushes with a single grease nipple underneath with just a radial groove round the pivot pin. I think COMPLETE assemblies will fit and if you have an engineering bent (not sure how far) you can mix and match as long as you make sure, by modifying bits, that grease can get to the area between bush and pin
