Well, I decided to do the BCP without the upfitters. I was strolling through Walmart and I finally found a switch that matched the scheme of the inside of my truck. I listened what you all said about not really having much room to strip wires so I bought one of those cool wire strippers that kind of strips the wire on its own. EASY, took me about 30 min. It works like a charm. Warms the vehicle up in 19 degree weather in about 5 min. I also love the reaction I get when I jump out of the truck and the high idle jumps up. I actually had one guy step back from the truck out of fear. Nice mod. Cant wait to see how it handles the truck and trailer batteries running the inverter and stuff. I do not understand the the PTO version. I need a little run down on exactly what it for, how it differs from the BCP. What good is it that it locks the torque converter if it only works with the brake on and it park?