The ones for the E350 chassis screw into the one hole that you unscrew the bump stops from, and I'm only doing the front. Unscrew the bump stop (one bolt) and screw the SumoSpring into that hole. Seems kind of simple. Thanks for the advice and concern, but I'm waiting to hear from someone with an E350 chassis. I have a local Ford dealer with a large truck bay as a fall back if it looks too hard or dangerous.
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