for the rear do 63" chevy springs, you would have to run a samll block, or use ford f150 springs, they will give you plenty of lift for 37s.
for the front use RUF, get two sets of rears and mix them together to make a beefier pack. you will want highsteer, if your on the cheap like i was i would get trailgear but if you have a little money it always nice to support marlin. remember you get what you pay for. those are real cheap springs but they work really well. dont buy them on the forsale sections here, ppl always want too much for them, go to your local pnp and find some for cheap.