Yeah, this one way trip is a net 700 ft loss in elevation. It's back roads at 60 mph for 10 miles then Interstate at 70-75 for 10 miles. The return trip is 20 - 21.
Here is a pic as-is without the grill block installed.
I must strongly recommend a block heater for any 4.0L owners (which I have installed)...the Open Loop fuel maps are not very good for altitude driving.
I picked up a lower air dam from an S10 blazer that I will be installing soon. I'll let everyone know what effect it has.