as for the welding, looks like that is what they did, but guess it was not that great of a job, asmany ofthem have broken apart at the weld. RUSTed up. also being .250-20 UNC they are small in dia.
Looks like there are carriage bolts all over this thing for the front fenders and panels, so it makes sense that carriage is the bolt of choice. Very few variety of fasteners were used then, versus now.
