It helps to have some description of what you have. You can put it in your signature so it is automatically with each posting. Typically the max static drop I believe is a 4/7 and I suspect it's a tough ride for the street. Maybe time to go bags???
If you have a 4" drop in the rear you should have a flip kit installed already. To get 2 more inches in the rear install a c-notch and the stock shackles. Add the 2" drop spindles in the front. Not cheap, the cost of the spindles and the c-notch is probably more than the economy 2-4 kit.