The Stovebolt Site Forums The Parking Lot Big Bolts 1946 GMC 1.5 ton

Hello team,
I’m glad I found this forum. Let me get straight to business. About a year ago I purchased a 1946 GMC 1.5 Ton dump bed truck. The dump bed was removed by the previous owner (which I would done anyway). It came with a tag line “running when parked etc”. I see the engine and all other parts are intact but I would need the following:
#1 Brake master cylinder
#2 All new u joints
#3 What is involved in converting the whole system to 12V?
Where do I get these parts new? Is there a site or dealer you go to? I’m in NorCal. Please help...