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crew cab dually ecomod
I have a 1988 f350 crew cab dually long bed with a 7.3l idi diesel, ats turbo, gearvendors overdrive. Wondering what are the most cost effective mods for increased FE. such as fastback cap, side skirts, air dam, etc. researched air tabs and they dont seem to be cost effective.
as far as a fastback cap it needs to be removable like a regular cap so i can put a camper or such in. thanks in advance.
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