ALL of the 5000 Series LCF's used the 17.5 gallon tank, just like the pickups. The 7000 & 9000 Series LCF's had a 21.5 gallon tank with a different filler neck.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD