OK..the tranny in my K5 is a gimp. I bought it for $50 so it has done its job. I am getting a "new" rebuild from a reputable guy around here. he wants $700 for the whole thing: $500 for rebult 4WD TH350 w/ shift kit (he says it will help with the bigger meats) $125 for the HD 6-bolt torque converter (again, for bigger tires) $58 for a 6-bolt flywheel (going rate) So $700 + exchange, is this what I need? He also sells the plain rebuilt unit for $410 w/o shift kit. So what would yo do? Are shift kits worth it??