1975/91 Econolines came with Saginaw P/S pumps. Find one a these in a boneyard w/a 460, get the parts from it.
1972/79 FoMoCo Passenger Cars with Hydro-Boost used the Saginaw P/S pump. Find a 1972/78 w/a 460 in a boneyard, get the parts from it.
460's were not available in Passenger Cars after 1978. Best bet is to look for a Lincoln or Continental Mark, cuz all had 460's thru 1977. 1978: Some had 460's, some had 400's.