I dont have a template anymore, but unless it's going to be a drag only car, I'd just trim small areas and open it as needed.
I used the templates on my '75 Dart Sport and it takes away a lot more than what's necessary. On my '65 Barracuda I chose to cut only what was necessary and it makes it look a lot cleaner under the hood.
I know these are semi-fenderwell headers in the links, but you get the idea.
