Good question, Shaun. And I don't know the answer to that.
As you can see below, supposedly the correct latch for a 1980 & 81 F-Series is a E1TZ 16700-A. But that would say that there was no latch for the 1980 trucks since E1 means it came out in 1981, and we know that the 1980 trucks had hood latches. So the E1 # replaced some E0 #.
But E1TZ 16700-A could be for an E-Series van as the one with a key-operated hood lock has an E7 prefix, so there had to have been an earlier one.
I don't know that we will ever know as I'm guessing my 1982 EVTM has the E1 # in it. However, I can climb the microfiche tower and look if y'all are that curious.
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI