As the front axles were 3/8" and the Bolens wheel bores 3/4", bushes to fit both were required. A hunt through my bits and pieces for something suitable drew a blank and nothing found on the internet. I could probably have made these up on my Unimat lathe but no suitable material to hand at the time. I came up with a different idea using parts lying around. New axles were made using 10mm coach bolts and nuts, stainless tube and 10mm bolts.
The tube was threaded10mm internally each end, it was luckily close enough to the correct tapping size. One end was screwed onto the cut down coach bolt after fitting it to the angle iron hub, the wheel retaining bolt fitted in the outer end. Suitable bronze bushes with the correct ID and OD from the spares box finished the job. These look a bit over the top but didn't take long to make. Took longer looking for the bits. The king pin was left at 3/8". Weld between the two inner ends made the unit extra rigid.