Does anyone know if the spindles off an '87 GMC 2500 2WD 6-lug front end will work on my '64?
'87 3/4-ton with 6-lug hubs? I thought the models that did that started in '88.
I don't know the answer to your question, but I'd start by looking up replacement parts for things like ball joints. If they use the same its likely the spindles will interchange. Or you could look up dropped spindles for both trucks, and if they are the same then these parts should interchange.