'67 NADA front axle question

[drc123]

Would anyone be able to explain the front axle differences between '67 NADA and a '66 with four cylinder?

I know the '67 has different part number, the leaf springs are different and the front prop-shaft is longer.

is the differential the same and axle case different?

any insight would be appreciated

David

[antichrist]

6cyl has 3" wide brakes (and drums) and larger wheel cylinders. I haven't seen any other difference in the actual axle assembly.
Yeah, I just checked my parts book, the brakes from the backing plate out are different.

[drc123]

you're right, I missed that

the brake cylinders on the 6 cylinder engine are a different size / bolt pattern, they aren't interchangeable

In a prior restoration, I had spare brake cylinders from a 4 cylinder, they wouldn't fit the 6 cylinder, the backing plates are different.

[antichrist]

to be clear, I'm pretty certain that the reason for the different axle assembly PN is because they come with the brakes as part of the assembly.