how much of a headache is it to rework a harness to be a stand alone harness? i am in the process of putting a 6.0/4l80 in my 83 swb cheby, and dont know if i want to spend the 575 for nelson to rework then another 375 for them to tune it, or just have them tune it and i do the harness rework? please give me your insights. As a side question, which motor mounts do i need so i can use my drive shaft that i already have? Truck has a th350 as of now.