Looking on line for brake rotors and it seems that I can find rotors for the 1979 model year, but very little comes up for the 1978 model year So whats the difference and how would I determine exactly what year axle I have?
'69 Ford Cummins Crew Cab... Built 6BT main & head studs, ported & oringed head, springs, Ti retainers, marine cam, tweaked P7100, 4K gov kit, NV4500 w/1.375" input, Southbend 3600# DD clutch, NP271 w/SYE, D60 HP front, high steer, 16" coilovers & 4-link, D80 w/disc rear, 4.10's & LSD, spinning 38" x 14.fiddy's on classic slots..... more coming!
The rotors are all the same dimensions except for the stud holes, so yes, the later rotors work great as long as you upgrade your 78-79 hubs to 9/16" studs.
The only part I'm sketchy on is some of the early to mid 80's light 3/4 ton 4x4 trucks with the Dana 44 TTB front axle used 1/2" wheel studs and what look like the same brake calipers as the 76-79 trucks. These may be the same parts as the early trucks, I don't know.
The heavy 3/4 ton 4x4's from 1980+ used the Dana 50 TTB front end which uses the same spindles and hubs as the dana 60, so they are a good source for parts to upgrade an early dana 60 to better brakes.
So to use the later model 9/16 stud rotors, I would have to drill my hubs for 9/16 studs or are there model year hub choices that fit the spindle bearings and have 9/16 studs?
'69 Ford Cummins Crew Cab... Built 6BT main & head studs, ported & oringed head, springs, Ti retainers, marine cam, tweaked P7100, 4K gov kit, NV4500 w/1.375" input, Southbend 3600# DD clutch, NP271 w/SYE, D60 HP front, high steer, 16" coilovers & 4-link, D80 w/disc rear, 4.10's & LSD, spinning 38" x 14.fiddy's on classic slots..... more coming!
The hubs are all identicle except for the wheel stud size. So you can run any 1980 to 97 Dana 50 or Dana 60 hub on it to get the 9/16" studs without drilling.
Well it looks like the 1/2" wheel studs are only that because the are necked down... looks like the bores already support 9/16" studs? Unless the 9/16" wheel studs even have a bigger base?
Hmmmmm....
'69 Ford Cummins Crew Cab... Built 6BT main & head studs, ported & oringed head, springs, Ti retainers, marine cam, tweaked P7100, 4K gov kit, NV4500 w/1.375" input, Southbend 3600# DD clutch, NP271 w/SYE, D60 HP front, high steer, 16" coilovers & 4-link, D80 w/disc rear, 4.10's & LSD, spinning 38" x 14.fiddy's on classic slots..... more coming!