does a 77 f 150 have a crank shaft sensor?

351W? According to: http://www.ford-trucks.com/forums/763884-crankshaft-position-location-95-351-a.html ...says it's in the distributor ..I know it says '95 in there but there is a thread about the 1978 so '77 should be same. All going under assumption you do have 351Windsor, as 1976 was last year for the 360 and 390 medium blocks in the F150 and 250 even F350 ....could find no images that I usually post on these types of questions