I made a set for my '36 Pontiac 4-dr sedan. A little tricky but you can do it. This photo shows my hinge. Make it of really stout stuff, 2" x 3/8" isn't too big. Lots of stress on this so needs to be strong. I formed the arms you see and welded each end to a heavy duty gate hinge I got from Home Depot that had nylon hinge inserts. I then welded the other end of the hinges to a piece of angle iron with the hinge pins aligned. Finally I bolted the angle iron to the body with 3/8" flat head machine screws with the heads counter sunk in the drip trough. The door end of the hinges were welded to flat 3/8" plates I bolted to the door. One @ an existing pad for the top opening trunk and one near the middle of the door to a pad I welded to the door matching the other one. The pads need to be along the straightest portion of the door so that makes them pretty close together. Don't take the top one up the curve or you will have big interference troubles. Bolt the 3/8" square pads to the door and put the door in the opening securing it w/ duct tape. Crawl inside the trunk from the passenger compartment and weld the hinge arms to the pad. Probably will need to heat and bend the arms several times before they contact the pads well. This will give you a perfect fit for the hinges.
The key to minimize interference with the body is to snuggle the hinge line axis as closely to the crease formed by the body and trunk opening as you can. Any deviation form that location will exacerbate interference problems. I also had to flatten the flange on one of the sides, I think it was the door to clear. No big deal, doesn't show from the outside and the rubber weatherstrip goes on fine.
I used the scissor lid strap from the vertical hood, just made new mounting points for the horizontal.
Also if the Chevy tail light pods are like the Pontiac, '56 Chevy tail light lenses fit perfectly. Notice mine in the picture. Finish off the bullet shape just right.