Back of Hood Rising

[Vandals909]

I have a 1971 with a 1967 front end on it. I bought it this way. On the drive home from buying it I noticed the hood rattling. It needs the weather stripping that goes between the cowl and the hood. Also after closing the hood it all lines up fine but in the back by the cowl. You have to push down on the hood by the cowl and the back lines up perfectly.

But after driving it for a little bit it lifts back up. Is this a fitment issue or possible weak hood hinge springs?

Thank you!