if anyone cares. . . . . . .

i have a 91 k1500 excab 4wd with the 4.3L and 5 speed, and 3.73 and get 18 at 80 on flat ground.  the truck is terribly under geared, it will no pull itself above 75 in 5th gear, but will go well above 100 in 4th.  i think this truck would get awsome milage, and power with some 4.56.

oh ya, its got 265s on it too.

soon ill be able to tell you what an 86 excab on fullwidth with 5.13s and 37" MTRs gets daily

Callen