I am planning a trip to colorado from western NY in October, 1800 miles one way in my 71 blazer. I have a 400hp 350, auto, 1 tons, 37's, and 4.56's Since the 14FF has a bolt in pinion, could I setup a set of highway gears, pop them in for the trip, swap back to the 4.56's for the wheeling, and go back to highway gears for the trip home? I wouldn't even bother normally but it is more than half way across the country, and ALOT of miles. At 3.00 a gallon, and a somewhat reasonable but optimistic 13mpg it would be 831.00 in gas. Even saving 150.00 would be worth it. My family lives in Denver so I have access to garages and tools.