Nice work!

Studebaker used that style hinge on both their hoods, and trunk lids from the 1920's through the 1960's.
They put springs on theirs. Strong springs on the trunk lids to hold the trunk lid up.
Lighter springs on the hood, not to hold the hood up, but to hold the cowl end under tension so the hood would move foward as it went up.
The springs also take out any pin slop. Bad part is the springs also hide pin wear.
DEEPNHOCK