I did that already, but I didn't have the front end inclined, and I may not have ran it long enough, but I didn't see any more bubbles and I could see the water flowing with the cap off.

Another question though, How come I don't notice any more torque with the EB crawler cam? EB said I would def notice a difference and I did it so I could more easily pull a trailer out west.

It's hard to beat old trucks!!