Mark, not to tell you what to do on your stunningly gorgeous scintillating restoration....
a very dear friend who was an old timer machinist, tool/die maker, Harley dealer from the late 20's through the 50's and and restorer from the mid 60's through the early 90's.... He could tell his restorations (inside engine and outside on chassis) from anyone else's by: All bolt head markings were upright or one direction. All flats of hex bolts were in line or vertical. all slots of screw heads were in line. He had boxes and boxes of screws, he would hand select each screw so the flats and the slots would line up when tightened in their hole.
fwiw, he called every threaded fastener a screw. He differentiated screw types by head type... "hex head," "button head," Fillister head," "round head," "flat head," "oval head," so forth and so on.
i like your differentiation between a screw and a bolt.
it makes sense !