2Questions: diff Amp services & Where do I get a sway bar?

Check roadmasterinc.com. If you put a large rear bar on, you should do the front too or odd handling problems (empty) can result. I used a Roadmaster 1.5" rear and a Hellwig 1.5" front on my '99 F350 DRW (Roadmaster did not make the front for that). Very nice upgrade, eliminated the sway. The Roadmaster stuff is a bit higher quality than Hellwig, but both work - its just a piece of steel after all. When you ID the part numbers you need, then google it - the best deals change almost daily.