There were 66 year only and 66/67 year only.
66 year only are the
dash knobs
horn button/ring
blinker knob,
transmission shifter knob
transfer case shifter and knob/handle and boot
carb
radiator(6cyl)
fender to fire wall bracket unless it was a heater delete
silver seat upholstery unless a late Pony.
rear axle with the plug
front axle cover plug was a brass 90*
doors
door mirror
jack bracket and location
dash pad
seat belts
tail light lenses
Bronco script on the fenders only has 4 pins
hub caps
silver visors
brass knobs on the vacuum wipers
eyebrow grill early
driver's side metal fresh air vent early
black rubber oval grommet behind the drivers seat early
hood and hood bracing, there was more than one style of bracing on the 66 hoods
66/67 year only are the
hard tops
tailgate
bumpers
alloy locking hubs
dash
steering column rubber bezel
I probably missed some, I've got a list somewhere lol. Here's a bunch of 66 reading I put together a few years ago.
https://classicbroncos.com/forums/t...S9DreeZu9auJjf5l4fg_EmetVc1ovGGIj6hkQzhqBgErI