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It was on for about 5 hours and was around 150 internal temperature. It takes a long time because of my spit height, and it needs to be tended often to add coals and watch for fires. This time I made some throw away deep spoons out of coat hangers and tin foil to collect the drippings for some gravy and to help prevent fires. I attached them to my frame with strong magnets I get from work so I could position them easily.
First I rub with olive oil. The rest is minced garlic, ground black pepper, fresh rosemary, and adobo all purpose seasoning rubbed on the outside. I also make a few holes throughout the meat and stuff halved garlic cloves in.
It took about 10lbs of charcoal. I would strategically place 7-10 briquettes at a time around the perimeter of my coal pan. I sprinkled some hickory chips on there a few times too.