I don't suppose anyone has had a go at fitting Rogers bump stops to an ARP4, with coilovers instead of leaf springs, have they? When loaded my springs do bottom out, with quite a bang too. The alternative is harder rear springs, but that will harshen the ride too or get some longer springs and wind up the clearance a bit.
If you don’t mind Paul I will move your question to
this thread to avoid the wrath of the mods here in the for sale section.