The interior is very original yet, albeit quite worn. The original dash cover looks quite nice yet. I've seen the 47/48 KF heater mounted in the early Js but not a '53 but as Jack points out, if the customer wanted one and the dealer had one it could be one of those deals. I never saw one where the dealer drilled holes in the dash to mount the controls - they mounted under the dash with brackets similar to the OD cable. But you never know what a dealer might have done. Regarding the holes where the earlier tail lights were mounted; you see a lot of them with reflectors or red lights and even in some cases, '51 tail lights in them because those 'K' emblems were thin metal and filled with water and rusted badly. I always thought a better fix was back up lights, even if they weren't functional. Do-Ray 451 or Yankee 975 and probably some others, fit right in there as do '51 Kaiser parking lights which were the same as those used on the Porsche from the early '60s.
The wire wheels are not KF issue and the hood ornament tip is for a '51 - you see that a lot because the '53 ornament tip was easily broken and very difficult to find.
Don't let any of these things stand in your way because none of them really matter.
