Thank you! This is great advice, would that explain the gauge acting all strange as well?

I know the 3k rpm is pretty steep for freeway driving I probably should just drive slower in the slow lane. I've got a Chrysler Torqueflite 3 speed auto and a 3.73 rear end with 32" tires so it's as good as it gets without modifying things further.

The engine was supposedly rebuild 20k miles ago when the swap happened, but I can't confirm that and am not sure how to fact check it really. I did just buy a cylinder camera that goes into the spark plug hole to check the pistons, hopefully that will give me some idea. She usually runs at about 190 around town on a belt driven non clutched fan.