Grinder,are you using a standard or stock wood plank floor?Or,are you using a plywood or metal sheet?A company called Legens Hot Rod Shop has a kit(expensive) for your fuel door.Personally,I just made a battery box for my '56 F100 out of wood and have it in my bed.You could do something like that.If you aren't good with wood,try a cabinet shop.Or you could use the piano hinge method and cut it to length.You'll have to fabricate some way of mounting it,too.Your latch can come from a boat company.Any help?