I have a 1983 Honda shadow 500 and I have a couple options for a parts bike?

So I was wondering what bikes would be best, obviously another 1983 Honda shadow 500 would be best but could I use a 750? Or another year?

What frigging parts are you looking for? Donuts and cupcakes sort of taste the same but if the donut is big enough the cupcake can fit in the donut hole.

Generally a mfr will stick with the same bulbs for several different bikes; inner tubes; inner tube Schrader valve stem caps; fuse block, maybe; some of the fuses; maybe some of the switches; touchup paint could be the same; possibly the speedo and tach; maybe the shift and brake levers if they're in the same place on both bikes relative to the footpegs. Hey dude… You can look on partsfish.com. If it's got the same Honda part number, like, it's the same part. http://www.partsfish.com