2004 gmc sierra 2500hd 6.0 v8

has a random misfire, runs fine othertimes half decent, has a oil leak, has rust, interior is not the greatest, tailgate bent, mirrors broke

shifts good, drives good, brakes good

new passenger side exterior door handles, new spark plugs, new fuel pump, No blow by, dont burn oil just leaks some here and there n drips on the exhaust, title in hand, 224k miles