hello re: rivets, hot rivets seem pretty tricky,perilous and unforgiving. my regard for authenticity is relative to the effort, expense and potential peril. i just looked at images of "plow bolts". i'd thought of them when i saw them at fastener outlet near here [syracuse ny]. they are truly a flat head, i suppose i could weld them in from behind may go that way? grade 8? hmmm i see that bolts in this area are fine thread thx