There are legal lift limits in Washington though. Your probably already over the limits with your 38's. Keep in mind, the more you stand out, the more you'll get pulled over.
http://www.truckworld.com/How-To-Tec...lift-laws.html says that the legal requirements in Washington are:
<4500 GVWR=24" front - 26" rear
4501-7500 GVWR=27" front - 29" rear
7501-10000=28" front - 30" rear
Also this site has additional laws in Washington (like mud flaps, extra lights, tint):
http://www.wattora.com/WALaws/