Won't Start need advice, Please read....

Thanks to all the help and advice I received, I couldn't thank each and everyone enough for taking time out of your day to respond to my post. First off I'm a little embarrassed as to the outcome of my problem. After exhausting all that I could do I decided to have the Dart flat bedded to a garage where they work on older cars. 2 hours later the mechanic called me and said your all set. Naturally, I asked what the issue was. The mechanic noted as well as I knew the valves needed to be adjusted since the rebuild was 500 miles ago. He remarked the points were a little off but the main issue was two spark plug wires were crossed. Now I even had a diagram showing the proper wire placement but I didn't even check since I have not touched more than one at a time. Now, some other things are now making sense. I live in NJ and drove the car out to Carlisle PA for Chryslers in Carlisle, it is a big show just Mopars. the car ran okay but burned 2 tanks of gas and the temp gauge ran hot but never boiled over. I'm wondering if the two cylinders not firing correctly would have caused the engine to run hot? The Mechanic who switched the rebuilt engine I'm wondering if he crossed the wires and they have been that way since bringing the car home.

Again I feel like an idiot but if someone else could learn from me not checking maybe it isn't so bad then...