I am not certain, but it might fit the 5 ton long bed, which has a 20 foot long bed.
Bruce
Olney, MD
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1991 M149A2
1990 M105A2
1989 M932A2
1989 M925A2
1989 M105A2
1988 M977
1988 M105A2
1987 M1045
1987 M105A2
1985 M1009 (3)
1970 M149A2 (for sale if someone wants it...$1050)
1964 M128A2C
1963 M332 (3)