I just finished hooking mine up yesterday. The stock oil pressure sender is in a tough spot at the back of the engine, but the temp sender is easy to get to. I just unscrewed the old senders and screwed the new ones in, then ran my wires inside the cab. Be careful because coolant will come gushing out when you unscrew the temp sender. I found an existing hole in the firewall that I could run my wires through, below the brake booster where all the other wires seem to pass through. I used a 3 gauge cluster that I mounted right next to the “wait to start” light where that little cubby is. I got my “key-on” power and dash illumination wires from the radio harness, just pull out your radio and the wires are right there. Overall not a bad job at all.