Hi all. Does anyone know the spring rates for the stock front/rear springs? When I bought my truck, the PO had put on Oreilly drop spindles (1.5" drop I think). I use my truck and a truck, so losing suspension travel has made my rear spare hit the ground in and out of driveways when there's more than a few hundred lbs in it. Rockauto has some 'heavy duty' springs, but I'd like to know what the stock rates are so I can figure out the %age increase. Thanks.