New rivets in the hinge is the answer.
Do you know where I can get new ones? Can I take the spring off and hammer the old rivers to make them tighter?
I think ol Mr. Russ Austin has new ones from memory.
You need to remove the bonnet/hood hinge spring too. When the spring is at full stretch, wedge some strips of timber into the or something similar.
Keep in mind, i've never done this particular job before, so maybe wait until someone smarter than me rocks along. (That won't take long)
I do have new rivets....but,...It is not a simple plug and play process. A metal lathe needs to machine a shoulder into the rivet. Then the ends need to be swedged to lock the rivet in place.
The new rivet is on the left, original rivet on the right. You can see the machined shoulder.
This shop does hood hinge repair. They will leave the patina on the hinge, or redo the original finish. Your choice. https://www.sms-auto.com/
A frequently cited source for "new" assemblies is SMS.
I have seen references to this supplier on the CLC forum or elsewhere but have no knowledge of pricing or quality.
When trying to open that link, my anti fraud softare blocks the site.
Opens ok for me without any warnings but one should always be safe when navigating the internet. I also never disregard cautions from my software.
You can google or search this info:
SMS Auto Restoration Services LLC
42 Manchester Road