Not sure if it changed for different years, but in '93 the square key is universal (i.e. ignition and doors) and the round key only operates the tailgate.
Again, wonder if that is a date specific feature. At least in the '93 the profile or offset of the round and square keys are direct opposites of one another.
PO had switched out a lock cylinder(s) somewhere along the line - I got 3 keys when I purchased it.
The ignition cylinder was pretty sloppy and Amazon had a package deal last year that included 2 door cylinders, an ignition cylinder and 2 OEM Ford keys for something like $75-$80 - far cheaper than the quote from the only locksmith I could find that would repin the cylinders to match.
Easy install as well.
Apologize if this info is irrelevant re: model year. Until VerticleScope sorts out our Bronco information (footers don't work with Tapatalk) I'm flying blind.
Interesting... All the keys and locks I can find laying around here have the same jog direction. This includes doors, ignition, glovebox, tailgate from 2 separate 78's, doors from several other 70-somethings', and doors from a '94 F150. My '94 ignition is missing, so can't compare that. Dates may well play a factor here, but I think it may also vary by region. Stricter vehicle security requirements in some areas, and cost savings everywhere else. The glovebox uses few pins than other locks, so a "dumbed down" key could be used there, but the master key would still work too, if pinned accordingly. At some point they also changed from pins to wafers, which I've never tried to rebuild but appear to be more complicated/costly to do so.
I know of someone who went so far as to re-pin several station wagons to have the same key to access all doors, ignitions, tailgates, etc. One key to rule them all. Not an idea I condone, but definitely do-able