Mixing car(5 lug) to truck(6 lug) is a problem because the GVW( gross vehicle weight) is quite different. The engineered weight at each wheel is higher for the truck than the car. If you go with an IFS(off a car most of the time) then the wheels and lug bolt pattern is what the IFS requires. If you change the third member( again, most are from a car) then you get the same application as the car it came from. Brake drum, backing plate and wheel cylinders are a matched group. Most trucks use a larger diameter and wider shoes to stop a loaded truck. Mich heavier than a car.
