Will these track bar bolts work for a 1977 f150 4wd

Unfortunately we could not say for sure. The kit does include a 9/16 x 3/5" bolt as well as a 5/8 x 3.5" bot for the frame side, and a 3/4" castle nut for the axle side. We do not know if these will fit the requirements of your 77 F150.