Originally Posted by NumberDummy

A 1973/79 F350 140" wheelbase Trailer Special is essentially equipped the same way as a 1973/76 F350 Super Camper Special.

The pigtailed wiring harness furnished with Trailer Special's plugged into the taillamp loom for the trailer lights.

On Camper Special's, the pigtailed wiring harness was used for interior Camper Lights.

2) D3TZ16720Y ..Trailer Special Emblem 1973.

2) D4TZ16720F .. Trailer Special Emblem 1974/76.

PartS catalog says "Cab" for location of these emblems. But after looking at some factory photo's, they show the emblems below the F350 emblem on the front fenders.
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1) D6UZ1142528A .. Trailer Special Emblem 1977/79-Tailgate

This same emblem was also used on 1976/79 Econoline Trailer Specials...and on...1978/79 Bronco Trailer Specials.

This front of this emblem says TRAILER SPECIAL inside a rectangular plate. Behind it and covering the left side of the emblem is the outline of the United States.

Were these trucks sold in Canada? Dunno.