I have a 1979 Bronco and i had to take out the rearend to do some work on it and in the process, i found that the wedge shaped blocks imbetween the springs and springperchs were cracked and corroded so i have to get new ones. Where the HEll do i get them from? I called one ford dealership and they said that part wasn't availible anymore, the second one i tried said they'd get them in 3-4days and it's been almost 3 weeks. I went to some spring/suspension shops but they all say go to the dealer. What do i do?
Your best bet is to just buy some thick flat stock and make them, That way there solid and wont crush like the cheap ones, ie aluminum type from the cheapo lift kits, I am having to do this for my 78, so i can race the Desert.
THE shims are to set the proper angle for the pinion. If you have a lift on it then most 4x4 parts stores have additional shims for the stackup.
I have bought them from ford for $25 apiece. I needed two of course, one for each side. Once the button that fits through the hole on the axle
'perch' is gone you can get some slippage if the u-bolts are loose(at all).Junkyard is really the best bet. Make sure you get it off a Bronco
though. The ones that came on the pickups were a slightly different angle.