Quick update (maybe nobody cares but might be useful).
I went back at the front doors and found a few things. Initially I was hoping to use 6x9 components in the doors but found the crossover point on the factory speakers was at about 1350 hz. Too low for a 3/4" Tweeter. I installed a 3500 hz bass blocker just to see how it all sounded. There was too big of a gap in mids, so I stuck with the 3.5s in the doors and will just keep the tweeters for another project or sell them. The rear doors are also not full range. The cut off point is around 1500hz. I'd prefer they just ran full range in the rear door, but with the headlinder speaker it sounds plenty full.
So my set up is:
Dash - 3 x 3.5 Infinity Reference
Front Doors - Infinity Reference 6x9 Component Mid Bass and 3.5 for mid and high.
Rear Doors - Infinity Reference 3 way
Rear Headliner - Infinity Reference 3.5s
Sub - PAC Amppro (for sub signal), JL10tw1-2,
Alpine MDR-M500
I'm running all speakers off of the factory amp (with exception of the sub). There is a slight reduction in volume but it's still plenty loud for my tastes. There is also a noticeable improvement in quality with smoother, more detailed mids and highs. The bass from the 6x9s was vastly improved. The stock 6x9s were pretty weak (paper) and sloppy.
This summer I may rebuild the box and run 2 JL 10s and a pioneer amp. I'd like just a little more air movement on the lows than what the single 10 can provide. I've disconnect the factory sub. It's just not that good. The infinity 6x9s add a lot of mid bass and really make the kick drum bump in rock music.
A note on the Metra adapters. I had to reverse the pins on all adapters with exception of the front door 3.5s. My guess is that doors are reverse phase from the rest of the speakers. I double checked each stock speaker with a battery to ensure I had the positive terminals correctly identified and matched up the adapters. So I'm certain that it is the same as how it came from the factory.
I Damped the front doors, rear doors, rear wall, and dash 3.5 locations. Added additional stinger roadkill carpet pad under front footwell. Added a MLV barrier to the rear wall.
It's pretty quiet in the cab and it's fun to listen to music and pick up things I'd not heard before. RAM gave a nice platform to work with on this truck and with a little elbow grease it's really shining. Wife thinks I'm silly but oh well.