midnightprowler
Nice. From my research shows only a black interior from the factory but if it's a military job tan would be ok i think.
My 1980 Series III 109 had very dark brown door cards and interior trim, while the seats, very similar to the later Defender type seats, were dark brown vinyl with a lighter brown fabric on the seat bottom and back. The typical SIII "deluxe" pleated seats were normally black vinyl as were the later slab type seats. On the earlier Series IIA the normal seats and trim were a dark grey vinyl with a very grainy texture commonly referred to as "elephant hide". All of the Series III padded dash panels were black.
I've seen the slab type seats recovered in many colors and materials so the tan seats are just fine for your truck.
Bob