By Bryan Gooding It was more than two years ago when the Posse heard a rumor that Cattleack Barbecue in Far North Dallas was going to be serving smoked pastrami for its Saturday special. I remember thinking “Wow! This is different!” Pitmaster Todd David would be cooking “outside the box.” Afterward I told Posse co-founder Gary Jacobson that Cattleack had thrown down the gauntlet with its smoked pastrami and that there would be a lot of pitmasters experimenting with recipes over the next year.  The times were ripe for some new barbecue. In the fall of 2015 Gary and I…