As far as the hinge arms being on the inside or outside of the bracket.....you do what works. It has a lot to do with where the brackets are placed on the hood, where the body is sitting over the frame and the bias, if any, from how the hood was trimmed. Most of ours go out with the arms to the inside of the bracket but just today I had to set one up with driver side inside and pass side outside......whatever it takes to get the hood aligned without stressing the hinges (too much). 15 years of these cars and they are all the same.......each one is an individual in the smallest of ways. I swear sometimes I feel like Felix the Cat. ( remember him? when he gets into a "fix" he reaches into his bag of tricks)I have so many little tricks to take care of all the little variables. Wayne P., Mark D, Jeff K, and every other pro builder will tell you "There are no two exactly alike" and what works for one, may or may not work for another.