A solid truck with the 7.3 is wonderful rig. Just an FYI the 4R100 is not quite as tough as the 5R110 found in 6.0 and later trucks.The 7.3/4R100 combo has a relatively small trans cooler and heat will kill the trans in no time. A set of gauges including trans temp and EGT is a must. Installing the trans cooler from a 6.0 is a very popular option. The factory trans temp is slow to react so all it does is notify you it is time to rebuild the trans. That said the 7.3 is much easier and cheaper to work on and buying a top of the line rebuilt trans is cheaper than the repair bills on a 6.0 etc. Ask me how I know!.