Way To Go Toggles!
Always wanted a vintage Maytag or Hoover portable dryer to go with my Hoover TT, however the lack of an outdoor vent hose and scarcity put me off. Like your unit, my vintage Whirlpool portable runs on 1450 watts, and yes have it connected to a 20amp circut. Takes about an hour or so for a load of heavy things like towels and such, but if one is careful about loading drying times are manageable. All these dryers work better with loads that have been extracted to within an inch of their lives, such as with a Hoover TT spinner or any other washing machine that has >1000 final spin extract speed.
Good luck finding belts and other parts. Did you try Sears Parts?
L.