Having owned one, Navistar(who makes International semis) made them. They were 6.9l and 7.3l v8s.N/A IDI until 94.5 then were the DI powerstrokes, still made by navistar until 2011. There was turbo IDI available during the first half of 94, excellent motor but rare.
They were even used in school...
I assume this also applies to the 79 e series? nd if so, hpw is the horn wired? I picked up a horn button with cruise but my van doesn't have cruise, I just need a horn switch. But the horn works only when I use a wire to it, and the ground wire from the switch gets hot when I press it but no...