OK, I got the ammeter and shunt installed. I've been driving too aggressively! If I need to stay below 100 amps I'm going to have to change my ways. There is a big difference between WOT and half way on the throttle. I put it on the positive of the battery in the front next to the controller. It then comes out to what appears to be another shunt for maybe the voltmeter? I mounted the gauge in the accessory shelf below the radio and angled it up. I ran through the firewall as rmay suggested. There was already a wiring harness going through there. The rubber has degraded so there was a little tear that I ran through. I might need some silicone this winter if I feel a breeze.
This is a 5 speed tranny. I finally found reverse. Second seems shorter than the original and third seems longer. When I took a few hills the way I've been doing it at WOT in fourth, the meter shot to 150 immediately. Back off to halfway and it came down to 100. I was still able to maintain 29mph. Thanks for all the help on this. I'm lucky I haven't “zorched” something already.