Towing 9k on 44's?
Contact Overkill (go over to TDS,
www.thedeiselstop.com) about Donohoe suspension lifts. Overkill can tel you straight up what it'll take to lift an Ex to roll on 44" tires, and it's going to be high.
I'm not sure I'd want to try to tow with it though... Up to maybe a 6" lift may be OK but you'll definetly need to regear etc..
Oh, and that "gasser sound" won't be hard to walk away form once you feel a 6.0.

I got my tuner back tonight after being updated and it's soooo go not to be driving stock anymore. Ever hear a 8000+ lb Excusion bark the tires in 2nd gear? Bawl them through 1st and 2nd on a good concrete road?

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2004 EDDIE BAUER EXCURSION, White, 4x4, 6.0 PSD
Eddie Bauer Premier, Trailer Tow Group, Cargo Group, DVD w/wireless, 3:73 LS, TC Skid Plate
Magnaflow Exhaust, Isspro gauges, V Code's, 285/75/16 Bridgestone Dueler Revo's