Has anyone actually done this or know of a link where I can find more info.?

I'm interested in knowing what kind of fuel mileage is possible and also about drivability issues like noise level, vibration, etc.

I guess ease of swap would be an issue too.

Truck is 4x4, 5 spd, 1500 series. Mostly for hauling firewood, fenceposts, etc. and daily driving. No heavy trailering.

Thanks.