This is the grill block example I saw. I have not done it yet. My current grill block is for the lower only, using pipe insulation.
http://www.gassavers.org/showthread.php?t=701&page=2
My commute is from Danville, CA to Downtown Oakland, CA. About 25 miles each way. Highway 680 and 24. Mostly freeway. It includes one gradual incline up to a tunnel with an elevation difference of 1000 feet. The traffic is generally not too bad. I generally cruise in the slow lane at 60 like an old lady now. Although I am only loosing about 3 min per trip due to the 60mph speed.
I have thought about getting a scan gauge, but have not splurged yet.