"Super-Duty"

Excerpt from "The FORD MECHANIC" Ford Service Forum No. 3- JAN 58

"For 1958, six new engines, involving many basic improvements in design and construction, will be included in the Ford line of power plants. Three of these new engines will be for cars (332/352/361), and three are "Super-Duty" engines for use in trucks (401/477/534)-models F, C, T, 850-950, F, C, 1000 and F, C, 1100."

I do not know about the distributor interchange. These are not passenger car engines.