Nice job, the way i did mine was slightly different. I had to cut those bosses out as they were really worn. I made new ones and installed everything including the pins in the arms, the pins held the bosses straight, i then welded the bosses into place. The pins did a good job holding the bosses straight. They did move a little bit when i took the bobtach off and welded around the ends to give it a good join. Taking a little off the bushings fixed the small amount of binding it had. I think i left my tollerences too tight in the first place, not allowing quite enough clearance for the grease, i think it was only .005 to .008"