So....... I started today.
I started with the trunion supports since they are most difficult. These pieces have to be exactly the same height for each pair.
The bearing holes have to be reamed as exact as possible to be in line. Any misalignment and they will bind. I milled them from cold finish steel.
They came out great. I made pins from .250 drill rod and put nylon washers and "e" clips to hold them together. ( the original had tapped holes and screws in the ends of the pins) , I like this better. This and mounting these is the most critical and difficult part. I have ordered some steel plate to finish the trunion assembly...... More to come.