possible street/strip 73 step side project

[68c10owner]

Going to look at a clean 73 stepside this weekend. Sold my 65 427 chevelle last week and already iching for another toy. So I found a 6.0 LS engine local and a couple 454 bbc`s for cheap. Looking to run low 12`s-high 11`s. Got a few questions. Never tried to make a heavy truck run this fast before so what kind of HP and I looking for here? Pretty easy to get 500hp from 454`s these day, more if you go with aftermarket heads and a roller cam. Dont know anything about the LS series of engines so what would it take for a 2003 6.0 with a carb conversion to run this fast? Can I do it with just a camshaft or will I need head work and more compression? Not sure what version the 6.0 is. And last, how big of a tire can I fit on a step side? Dont really want to cut into the bed but will if I have to. Plan on cal tracs but dont know what else to do with the suspension on one of these trucks, use to chevelles and el caminos.