Matt, have a look at my postings I recently did on my Air Grabber setup.
It's on the Roadrunner nest forum.
Here's the link.
It starts on page 22 and goes to page 24 with other tidbits in-between.
The Air Grabber set-up I bought was from Stinger fiberglass.
I did not buy any under hood components as I didn't want a fully functional one.
To answer your question about the mounting holes for the door, you will need to buy the hinge for it.
Here's how the hinge is mounted.
View attachment 1345393
The only other mounting area is here (circled in red).
View attachment 1345394
There's a pin that goes thru both sections - the head of the pin is visible from the outside but when you apply the side decal, then said pin is hidden.
Here's the curved pieces that hook up to the rest of the under hood components to make it go up and down (circled in red).
View attachment 1345396
I hope this gives you some insight.