I totally missed these were from Mopar Performance, I should have installed mine years ago to boost my HP.
BTW, I would be interested in a reproduction one.
TPS should be 17% at idle. Test your O2 sensor resistance between A&B should be 5-7 ohms.
Edit: I see your O2 sensor is switching so it looks like it's working properly.
If you want to never have to replace that plastic tank but want to keep the closed set up you can get one of these http://macsradiatorshop.com/replacment-jeep-radiator-fill-tanks.html
Pricey but very well made.