I'm strongly considering a 2003 f350 CCLB. It's bone stock with 180k single owner truck. What upgrades are a must. I'm looking at a 4" exhaust but what about tuner and intake. I really want a 6.0 due to the extra power but can't find one at a decent enough price to have extra to bulletproof it. I'm leaning toward a DP turner and want to be able to switch on the fly.