Yessir. There should be slots in the hinges where the bolts that mount them to the fender are. Try "lowering" the whole hinge on those slots, or "rocking" the hinge using those same slots so that it's lower in the back than in the front. It's definitely a trial and error procedure - go slow and make small changes.
Can you push the rear of the hood down to the proper level after it is closed? If you can the hinges are probably "sprung". You need new hinges,or just push em down by hand. If it is the adjustment,do what Bear suggests.
71' GTO Original 400 M20 3.23 posi email@example.com MPH on street tires
Be careful. it is easy to kink the corners of your hood and ruin it. Make sure the hinges are lubed up really well too. I use Tri-Flow lube. You can get it at lock shops and gun stores. It leaves a dry film of teflon that lasts for years.
Funny as it may seem, hood springs hold the hood up - and down. I have a '67 also and after trying several alignment adjustments I figured I'd just have to live with the hood sticking up by the cowl. Luckily - not so! A trusted shop tipped me off it was the hood springs losing thier strength after 45 years of opening and closing.
Try replacing the springs, but close carefully the first time to make sure those adjustments you've tried wont cause any interference. Try the ones from YearOne as the OPGI's version seem to be on the weak side. I think you'll be happy with the results.