I don't know the status of your Kingpin. I had a similar situation. I had the kingpin kit. I had a propane (think handheld for plumbing) torch..... was useless. Friend said I need a "Rosebud" and I had no idea what he meant.
(all this was 10 years ago)
Kingpin got worse and last year, I finally decided it's time to put a fight to fixing it.
Another friend (who's got a full fledged machine shop) brought his rosebud over, useless. I had wailed on the top of the pin to "drive" it out....DON"T DO THAT. I mushroomed it and created more issues.
I had cut the pin with my saw to get the steering knuckle out of the way (yes I had that much slop!)
Gave an idea to my machinest friend.... he fabricated a "triangle" and I bought a bottle jack. I think it was ??? do they make them 30 tons? It's a stout little booger.
We tried several configurations. Bent some steel. This pin was NOT going to come out easily. I had sprayed it for probably 2-3 months with oil to try to let it work its way in there.
Ultimately, he built this inverted "A" frame and we put the bottle jack in there. We had a huge amount of pressure on this and again, the pin wasn't budging. Then a lightbulb went off in my head.....I grabbed the sledge and didn't hit the pin but instead, hit the arm that holds it with all the pressure tensioned up in there. It gave way, moved about 1/2 an inch BUT the entire machine shook. There was a lot of stress going on.
Once it moved a little, I knew "we won" and now was a matter of being persistent. We finally got it out, I honed the bore and the new one barely, but simply slid right in. It had to be essentially perfectly aligned.
So, if you have any issues, this may or may not help you but your knuckle might be in the way. Hopefully you have it out and it "simply slid" right out.... Mine wasn't so agreeable.
Oh, and when we had all the pressure built up, it wanted to torque the assembly to the side. Just happened that I had a grade 100 chain so we wrapped things up with the chain and then attached the chain to the other side of the machine to keep the assembly vertical so the pressure would push up rather than out to the side.
This contraption was straight when we began.
Below was early attempt with some threaded rods. It was a major failure (useless attempt)
The final attempt was with an all steel, inverted "A" frame to hold the jack in place.
Some of the damage
Maybe not clear is on the very top piece, there is a hole for the Kingpin to go through. We were pretty tickled for getting this done in my front yard! It really gave a fight. I think the machine is around 1987 time frame so it's had plenty of time to rust/sieze/lock itself in there.
