A body hood hinges

Interesting...never had that issue....I would say check the spring orientation but you tried another spring...so I wouldn't think that would be the issue.
Pre 70 hinges are adjusted by a slider in the hood, 70 + up are adjusted by the bolt holes being slotted oval, still I don't think that would be the issue (thinking wrong year spring, all look the same except for adjustment method). I found this adjustment issue when trying to use 73 Dart hood hinge on a 69 barracuda...cant adjust the hood.
Anyway...great sign in name by the way lol