It's the 5.8L gasser. I know the cost benefit thing says get a new truck, but I don't really want to part with mine. I've had it for 7 years, and I can see having it 7 more. It's got 8" lift, 44 inch tires, 5.13:1 gears and 9-11mpg as my daily driver. I've done all the work to it myself. Not all things are done strictly for practical reasons.
Here's my thinking.
Pull the old engine, transmition, exhaust and computer.
Drop in engine and tranny assembly (new motor mounts, verify compatibility with transfer case)
Install new floor shifter for 4R100 tranny
Install aftermarket exhaust, Banks or similar
Splice in wiring harness/ install new computer
Install Boost/Pyro/and trans temp gauges and tach
Re-use existing radiator (already upgraded)
I've done one engine swap before. Yes it's a big job. I don't plan on saving money by making this conversion, in fact I expect it to be a little expensive.
Anyone familiar with the electronics on new vs. old 7.3L powerstrokes?