1999 Crew cab OBS 5.3 Swap

[flattopwill]

Just get a 6.0L

Don't waste your time on anything else.

I disagree. It depends on what you are going to use the truck for. If you are planning to do alot of hauling/towing then def track down a 6.0 but if not then just go with the 5.3 because it will already be a huge improvement over whatever you are taking out.