Do your self a favor and use the 1/2 inch pins as stated. Drill a hole in them and use a washers and clips or cotterpins to hold the hinges in place. Easier to remove and replace in the future for service if needed and hold much better.
I will do this on my new project. My hinge came off my orange Duster. what a mess trying to get it on. I had to hold the hood up while I was yelling for my son to come help. Never again. It won't happen on this one.