Converting 8 lug to Dually front end

I have a GMC 2500 with a dually rearend and it still has the 8 lug front. Can I just change the spindles to dually spindles or do I need to change control arms brakes and everything?

go to your local GM dealer and do a parts cross reference

youll need the dually hubs, they should bolt on to your wheel studs.