Originally Posted by Rob the plumber
Go with the Windsor. Mileage should be negligible.
Good advice....they are BOTH "Windsor" engines.
Might as well get go with the 5.8L though. You'll get similar mileage with either engine, but at least the larger displacement justifies the consumption with the power output. The 302 is underpowered for 4x4 trucks and loses much efficiency because of it.
Gear for the road and use Low range if needed off road.