I was wondering what all i need to put stainless fuel lines on my 99 ss. Thanks!
Your question is extremely vague and nobody is going to be able to answer it without knowing what it is you are asking.
For example... I have no idea if you are talking about running stainless braided fuel hose on your vehicle, and you simply don't know how to get the hose into the fittings. Or if you are talking about running stainless hard tubing for a potential E85 system.
What lines are you trying to replace? Just the feed in the engine bay? Running new ones from the tank all the way to the front? Keeping the stock routing, including keeping the regulator in the tank, or are you trying to run a regulator in the engine bay? Aftermarket fuel rails or stock?
The last thing you want to do is pick the wrong kind of stainless braided line as well - the rubber lined stuff will deteriorate and leech fumes over time, so I'd highly recommend using something like Goodridge teflon lined hose, but it is pricey.