I had the wife stop at the local meat shop today for a 7-8lb brisket, and the kid at the counter gave her a brisket that was 8.2lbs and 4" thick. Does that seem kinda thick for brisket? I've only smoked a few and they've all been much thinner. What I'm wondering is cook time, do I use the standard 1.5hrs per pond? Any suggestions would be greatly appreciated.