Those goofy temperature sensors often use a brass stud with a groove to hold a push on wire terminal by friction. This instead of a screw. The wire falls off easily and you have no temperature sensor. Hopeless design used over and over by many manufacturers.
Thanks, everyone for the help. I ended up getting it working. After replacing fuel lines, cleaning the fuel tank, new wire harness I still couldn't get the rebuilt engine to start properly. The company that sold me the engine told me everything was rebuilt and tested. Turned out that wasn't the case, I had the fuel pump rebuilt and it fired right up. County Sales and Service out of Ohio were too good to be true. Sad that they wasted so much of my time.