Comparing what i have to the pic, i notice u have one black wire going the solenoid, with my car i have 2 wires, one that is black with a yellow stripe and another that is a thicker black wire, both connected together then connected to the solenoid, should i just have one, any ideas what these wires are

Download the factory service manual for the '73 (resources tab on top) and take a look.

xenons30.com

another question i have, and maybe this could be the problem, is that when i went to tighten the the bolt on the solenoid (the one with the positive wire from the battery connected to it) the whole top piece now rotates and moves, could this cause a problem from the solenoid? the parts that rotate when tightening is the whole top piece, where it has the one bolt that the positive connects to, the other bolt that has the black wire running from the starter motor, and the connector that connects to the black wire

Because all my wiring n voltage readings seem to be fine, based on the manual u told me to download, btw thank you very much, very helpful

If you think you may have a short in the solenoid it may be worth remove the screws and taking a look inside. There should have been a jam-nut on the post to keep it from spinning.