The springs serve as the control arms. Control arms are only needed on coil spring applications. Coils can't prevent the axle from turning under torque.
I don't think you really need them, unless you're going to the drag strip and need to prevent axle wrap from torque reaction when launching. Then you might consider snubber arms extending toward the front.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.