Kit linked lists 7/16 bolt on the caliper. Hoses appear to be offered for several variations:
6178562 Front DOT Approved Brake Line Kit
1969 - 1977 GM with 7/16"-20 caliper thread
Comes with 16" Brake Lines
6178565 Front DOT Approved Brake Line Kit
1974 - 1977 Mustang II with 7/16"-24 caliper thread
Comes with 19" Brake Lines
6178561 Front DOT Approved Brake Line Kit
1978-Up GM with 10mm - 1.5 caliper thread
Comes with 16" Brake Lines
This is where I came upo with the idea that a guy could buy the 19" line kit and swap the bolt for the GM bolt (both 7/16, diff thread pitch). Kit specs the early calipers:
Kit Includes:
New 11" brake rotor, 5 x 4-1/2"
Semi-metallic brake pads
GM Caliper slide bolts
Reman. metric calipers (7/16"-20 inlets)
Mustang II brake brackets
Hardware
New bearing and seal adapters
Seals
Dust caps
Instructions
Does not include washers or spindle nuts
Ford bolt pattern 5 on 4-1/2" (increases track width 1/2").
Probably go with the earl's anyway, I prefer the swaged lines for street use. Little too much at stake.