His draw likely will shorten by an inch or more switching to a traditional bow. Regardless, just want to stay with a longer bow -- 62-64 inches or longer in a recurve, probably 64 inches or so in a hybrid and 70 inches in an ASL. Nothing at all wrong with an ILF set up, and pretty easy to work up a 66-70-inch recurve using ILF components.
Of course, he can go with a shorter bow (some folks with long draw lengths do) but finger pinch and stack will be greater.
Also a good idea to not go too heavy to start. I'd recommend something in the 40-45# range at his draw length.