460 displacement appeared in Linconls in the early 60's I think but they didn't have the porcupine valves or ball stud rockers of the 385 series 429/460. Quite a different ballgame.
You're thinking of the MEL engine design which came in 383, 430 & 462 sizes. VERY different engine. 385 engine design (370, 429, 460) was introduced in 1968 as a 429 (Thunderbird, Lincoln). 370 (heavy truck) & 460 came later (unsure exactly).
I have a 1973 super camper special with a 460 in it. It is (was) the original engine. It was built in December 1973 at the Lima plant in Ohio. I think it should have been registered in Canada as a '74, as it was likely sold to its first owner in early 1974, but the registration and the VIN lists it as a 1973 Truck.
All the literature for ford trucks I have dug up over the years on the internet pretty clearly state that 460's were not available until the 1974 production run.
1973 F-350 Super Camper Special
1991 E250 Camper Van
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