Rear portion of hood not closing?

[straight6chevyguy]

Hello everyone been working on my new to me 78 c20
The truck was my uncles up until his passing.
I've mainly been working some of the bugs out but one thing that's really bothering me that I need to get fixed is the hood. The rear portion doesn't want to close all the way.
And if you try to push it down it just pops back up. Not sure if this is a common problem or not or if my hinges are bad or what they don't seem to be bent or anything.
Curious what you guys think.

I should add that it wouldn't be too surprising if my uncle put different hinges on from another truck that may not even be correct. They look correct though.