thats why I like a shackle flip with axle floped ontop of the springs
no wheel hop just spins or hooks.
the axle under set up has always made the rear of a truck jump around,the shackle in stock position flops back and forth as it wheel hops/bounce/rebound
with it flip and the weight loading the shackle and spring it does a much better job controling the wrap up in the springs.
the way the leverage is applied to the spring makes all the difference. IMHO
you can make a traction bar that goes under the u-bolts on top of the spring.
make a plate with an anchor/pivot point and bolt it under the u-bolts on top of leaf spring.
make a rod with a heim joint on one end and a threded stud on the other end.
drill a hole in the front spring mount and use rubbers and washer from a front shock on the stud end and hanger.
done this for a few 4x4s when running the axle under spring,makes a nice traction bar and is up out of the way.
this will elimnate wheel hop on the cheap.