McCloud (sp?) is well respected in the drag racing and heavy duty market.
No offense, but sounds like you are fairly hard on a clutch or if you are not, your setup is hard on the clutch due to the 'city driving' and high torque mods. It might be that due to gearing, tire size, and the slipping of the clutch to deal with stop n go traffic that you will get wear on the cltuch.
I have a stock truck and have over 200,000 and drive in Houston stop n go traffic and I bet my clutch does not have that kind of wear - so your wear is due to the truck performance, the driving conditions, and yes, the way you drive it.
Be realistic and see if there is anything that you can do to change the way you let out the clutch. For example, if you drive with your foot on the clutch pedal -even after releasing the cltuch - you're potentially causing wear on the components.