[Walts_restoration]

10 bolt and 44 will not swap the inner gear sets, although should be able to interchange everything from the c's outward. Why do you want to keep the 44 in the truck if you want 3.73s? small 44s are just like the 10 bolts and the only thing above the 10 bolt they have is a 30 spline vs 28 spline (on the 1978-1988 versions). The 89-91s had 30 spline versions, but you already said yours is a 79.