A little update.
The other day after it rained the passenger carpet was a bit wet. Yesterday morning, I found this....
Damn. I hate chasing water leaks. It's like the trailer all over again. Play the "where did you actually come from" game. Poked around and determined the HVAC box was suspect. Pulled the blower...
Yup. Water. After looking around with a light and my phone (to see around corners :lol

i determined that it must be coming from the cowl intake area. So, playing with a bucket of water now...
After my creative investigating, the cowl came off. Turns out one of the screws directly above the HVAC intake was tightened too tight and caused it to be ALMOST stripped, compounded on the fact that the two screws on that side of the cowl were missing any sort of gasket. Seems like a stupid oversight on GMs part to put two screws directly above the intake for the HVAC that need sealed. Gave them both some RTV and called it a day.
After that little fiasco.... I went about installing the Rear Kodiaks.

Now she's looking like a real truck.
Also had a set of bosch injectors rebuilt for the 454 show up. No more hard warm starts in my near future.
Another thing I've been tracking down is a bit of driveline vibration. It was there when I bought the truck, initially I thought it was the carrier bearing. While the trans was out I did all 3 rear u-joints and the carrier. The driveline pieces are keyed so you can't put them out of phase. I did pull the slip yolk u-joint and flip the rear shaft 180 deg from the front shaft, it seemed to help but the vibration is still there. I also noticed I have 1 wheel that isn't very true at all. Since these are Toyo tires I'm thinking I'll have les-schwab re-balance them all, maybe swap the seemingly bent wheel for the spare. Also considering getting the driveshafts re-balanced. Who knows maybe one lost a weight?