Your issues are common to all of these trucks.
I heat the pins with propane torch until they are quite hot, then spray with Kroil. I them let it cool for a day and repeat the process for as many days as it takes. They have always given up before I did.
Heating and allowing to completely cool expands and contracts the steel pin and the cast iron rod ends. Once they do that enough times, it leaves space for the kroil to get in and do it's job.
The best part to me is that when I am done, I can reuse my original parts which I know will fit.
Besides that, its the only way to get the old ones off without a cutting torch.
