Okay, so tonight I had time to work on the issues I was having. The MAP sensor wasn't connected, which did need to be extended. The oil pressure sensor also needed extended. So after stripping some wires, soldering, and reinstalling, everything is good.
One thing to note is, the manifolds I bought have the newer bigger flange size. My Durango has a smaller flange and my factory exhaust won't connect to the manifolds. I ordered some flanges that will fit, and I will have to update my mid-pipes (off-road) to fit the new manifolds.
Here is another test start. Sorry it's short, it was midnight, had open exhaust manifolds, and no coolant in the engine.