I imagine a lot of people on new installations use barrel nuts instead of how they were meant to be installed - speed nuts with integral sealant. What a pain it was to locate the holes properly (I did mine in 1974; no aftermarket templates, then). Had to get really inventive to reach through the hood holes to reach the studs -
BTW, the hood was $83.00, the emblems were $3.00 and change apiece. Drove the car hoodless to the dealer, pulled the hood out of the box, bolted it to the hinges and attached the latch, closed it and drove home. Amazing what you'll do to look good in your Z (the car needed less help with that than me-). Guys in the parts department good a good laugh out of that one, and so did I.