I haven't done a 4x4 80e conversion. I think NelsonPerformance has done one. I did all my own work so no labor expenses just the cost of the materials, $1200 trans, $900 Vig convertor, modify the crossmember, modify the wiring, change the TCM programming and swap to an 80e/TH400 yoke. The costs are whatever you can get your parts for.