[MrE]

@"Floridian", I have an '86 that the 8V92 seized up in. My goddaughters boy friend was a member of a group of engineering students at the local university that were trying to set the land speed record for bio-diesel at Bonneville Speed Week. I loaned him my coach and it seized up on his way back. Instead of trying to repair the 8V92, I bought a 2000 Denver transit coach with a little over 200k with a Cummins ISM and ZF transmission as a donor coach. After the purchase I bought a Cummins Insite Inline 5 Data Link adapter with software. I discovered that the mileage on the speedometer wasn't actual mileage, it actually had over 800k. There are two rebuild kits from Cummins, one for up to 370hp, the other for up to 500hp. I bought the up to 500hp kit and had the motor rebuilt. With the ECM and CanBus, I will attempt to use Torque Pro and an Android tablet for my digital dash, they currently have a J1939 interface in beta. If that doesn't work I'll probably go with Silver Leaf.
As far as the air conditioners go, I had mine plugged into my house 240v during the summer and my electrical bill skyrocketed. I will be looking to replace my rooftops with energy efficient models.