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Thanks for the links, I checked them both out and it looks like all those are for 1964 and newer years. I have a 1961 and those rims were year specific from what I've been told.
Seattle, from my understanding the bolt pattern on your 61 Dynamic 88 will be 5x5". You should be able to use any wheels with the same bolt pattern as long as the backspacing, offset and center bore diameter work on your car (might not be difficult to match center bore diameter if your car has 4 wheel drums). A problem you may run into is using OE wheel covers on 5x5" wheels from a different car. Remove one of the wheeIs from your car and do some measuring, then check your local salvage yard for any of the vehicles listed above. Here's another good thread:
'63 Holiday 88 wheels available. Southern New Mexico. No bead rot. Not sure if will work for you, just throwing it out. Believe these are Fifteens. I did see a Fourteen 5 x 5 once in the yards, loose, what a strange animal.