I scrapped the welded bolt and bushing idea for front spindles and bought spindle stubs and 4 on 4 hubs from surplus center. These are 1-1/4" dia steel stub axles used for building trailers. The hubs have tapered roller bearings and seals just like a car has.
I cut a hole through some 1-1/2 x 2 box tubing and welded the stub into it. Plated both ends of the box tube then welded 1/4" tabs to both ends for my heim joint mounts. Now I can run a 7" long 1/2" bolt through both heims and tabs with a tube spacer between to prevent flex.
waiting on some steel swedged tubing to extend my tie rod tubes then I will make the pitman arms.
Over all front track hub to hub with the spiderbox is 51" and I can fit a 20" tire no problem!
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If the only tool you have is a hammer,
Then all your problems look like nails.
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