Polyurethane Suspension Bushings
#41
Here's the solution. For the V6S RWD, use the shocks from a 2015 RWD V8R. That's a stiffer shock to support the heavier weight. Might be just right for the higher rate H&R springs (maybe too much for the VAPs, but I don't really know without detailed specs on springs and shocks)
Probably makes sense to go for the KWs at that point..