Budget is definately what this project is all about! Just picked up an 8.8 explorer rear with 3:73 gears, trac-loc, 31 spline axles, and disc brakes for next to nothing and will be narrowing one side of it to center the diff. The th400 was the cheapest option that will hold up well(although an overdrive would be preferred). He built it himself using a 750hp capable kit from jakes performance. The 5.3 is mostly stock other than a fresh valve job, ls6 cam/springs, and arp head bolts. The turbo is just a Borg Warner s400 1.1 75mm from forced inductions. It may be too big but many others are using them and they are CHEAP. The wiring harness was just a factory harness he modified to work. All truck accesorries are being used along with the intake and oil pan for now. using flipped cts-v ls6 manifolds leftover from a buddys car. Mounting the turbo on the passenger side up front.