Mechanically, is there any difference between the '79 & '80 Broncos? Specifically, can I use an '80 EVTM for the '79?

 

Everything changed between those years.

 

78-79 Broncos are similar, the 80 is a in-between more related to the 81-89 Broncos, but it still has several diferences with those...

 

There's almost zero visual difference between an 80 and the rest of 81 - 86 (minus the FORD lettering on the hood that the 80/81 has). But the 80 had a lot of electrical stuff that was different.
I know when I was ordering stuff like headlight, wiper, etc. switches, there was 80, and 81 - 86. The 80 part was usually 3x as much. Looked the same though.
However, almost all of it is completely different than a 78/79.

 

Isn't the 80 one of the swiss cheese frame years? But yeah they pretty different solid front axle verses TTB and totally different body styles.
-John

 

80 and 81 had the swiss cheese frames, but not all of them. Just a bunch of holes cut in the frame to save weight. Good thing they quickly realized it was a terrible idea.

 

Agree with everything the guys already said. But clue ol' Greystreak in here... what's an EVTM? I thought I knew all the acronyms.

 

To me it sounds like: Electronic Voltimeter, not an acronym, any other guesses?

 

Electrical and Vacuum Troubleshooting Manual<!-- / message --><!-- sig -->

 

Electrical Vacuum Troublshooting Manual.

 

Oh brudda, guess maybe folks 'round here aren't up on the lingo, we just call it a shop manual. That's a mouthful. EVTM... hmmm, Ok.

Electrical and vacuum cross-referencing is simpler with a multi-year book. And chances are, if that book stops at a particular year, there were enough changes to make the cross-reference to the next year difficult to say the least. Just a lil' input from the guy who has never even called such a book by its name. Suppose I learned something today.