With a 16-week rooster, I shouldn't think anything fancy would do more than hide the taste of home-raised chicken. But because it has some credentials, you need to cook it fairly slowly to prevent toughening the meat.
FWIW, with birds like this that I mean to roast whole (or, if there's room on the grill, butterflied: cut down on both sides of the backbone, remove it for the stockpot freezer bag, and then crack the breastbone by leaning on it until the bird lays flat; a butterflied chicken cooks much more evenly on a grill), I just sprinkle them all over, inside and out, with salt and pepper (one level tablespoon Kosher salt per five pounds of bird), and let them sit on a rack in the fridge for 24 hours so the salt penetrates the meat and the air tightens and dries the skin.
About an hour before cooking, I let them come to room temperature, and then rub all over with fat (olive oil, butter, bacon grease, whatever), and then set them in a preheated grill, with everything on high, for five minutes; then (with a gas grill), I'd turn off all burners but one, and turn that one to about half-way, and then cook the chicken in the cool part of the grill, turning about every 20 minutes. Should take about 25-35 minutes per pound, but you can tell when it's truly done by moving the leg freely in the thigh socket, or by seeing if juice from the vent runs clear--or, the most precise way--by testing the thickest part of the thigh with a probe thermometer: you're looking for about 160F.
Probably more than you want to know about roasting a chicken, but a properly roasted chicken is one of the world's true perfect foods.