It was done by KS Conversions in Waco Texas. They did my dads 2009 right after he bought it and still has it with no problems so that's why I took it there. To answer your question. The frame was stretched under the cab. I believe there is a factory joint there that he cuts out and puts in a longer piece. The wiring harness plugs in and is not spliced. New lines run and driveshaft was lengthened. Hope that answers your question.