Nice story Kevin - Thanks.
Gave the tubes a final sand with the DA sander, washed them off with thinners, applied self etching primer and then painted them. In between coats I worked away at stripping the parts off of the mounting plate. Got the clutch and driveshaft and various brackets off and was left with the cross shaft and the steering gear and arm - the gear and arm were seized to the shaft which I have encountered before - not a big deal but unfortunately the assembly the way it sat would be awkward to unseize and press out - my little home made press is not big enough to fit the support into it. I knew from past experience with a 1050 that if I could remove the left bushing then the bushing hole would be big enough to let the shaft pivot enough to be removed. I tried to drive the bushing out with a small flat screwdriver but I was starting to damage the edge of the bushing and I knew if I kept going I would destroy the bushing - I wanted to try and save it if possible as it did not appear to be worn very much. I put my thinking cap on and came up with a plan - found a piece of plastic water pipe I had left over from another project that appeared to have a nice thin wall. Cut a slit in the pipe so I could compress it over the cross shaft with a hose clamp and then hit the end of it with a hammer thinking the worst that will happen is the pipe will split - made sure I had a pair of gloves on my hand and was wearing safety glasses in case the pipe fractured. To my surprise the pipe started to drive the bushing out so I stopped and took a picture. Tapped on the end until the bushing was out but then I found the pipe was trapped in the hole - it must have been very close to the thickness of the bushing. I sprayed the part that was sticking through the hole with some WD40 and tightened the hose clamp on the pipe so it would bind with the shaft and tapped the shaft back out and removed the pipe. The bushing came out undamaged except for where I had tried to move it with the screwdriver.
Can anyone advise what the thickness of the friction material used on the pulley and the brake plate and the thickness of the material on the brake arm would have been originally?