I used to know one of the engineers who developed the V-10 truck engine. It was based on the Viper design but not much would interchange. They are basically two different engines with the same displacement. It was held up three years before going into production so they could get the "whipping" problem on the crankshaft solved. The V-10 equiped pickups go cheap compared to similar trucks with the 6 banger Cummins because the V-10 is a VERY thirsty engine and doesn't have the durability of the oil burner.