So my truck has a 3in body lift already installed when I bought it. The only problem is that the lift is an old one that is made of 3 1" rubber spacers on top of eachother that resemble hockey pucks. The problem is that they are dried, cracked and some of them have collapsed. I am in the middle of some body work and I would like to replace them before the truck goes to the bodyshop for paint. I ordered an new 3" body lift kit with solid 3" spacers. It looks like this: http://store.summitracing.com/partdetail.asp?autofilter=1&part=PRA%2DPA%2D513&N=700+4294918515+4294908216+4294925023+4294908183+4294789402+4294906205+115&autoview=sku So finally my question for you guys is: Do I need to put these on top of the stock bushing which aren't on my truck, or can I just put them metal to metal? Also If I do need to put them on top of the stock body mount bushings, then where can I get them for real cheap? Also would it be better to use the factory rubber bushings, or aftermarket poly bushings?