Hey folks wanted to pass on some pics and tips from my airdog install hope this helps.
Truck 1999 Dodge 3500

The hardest part I think is getting the old pressure and return lines clips to release off the top of the tank in limited space (these aren't reused on air dog 150).
The pic of the red clip is for the electrical connector on top of the tank for the sender connection it must be pulled out toward the back of the truck to release the connector.
make sure these are loose before lowering the tank as the parts/lines are plastic.
I just used a floor jack and short 2X6 to spread support under the tank. It is best to do on a near empty tank.
The top unsrcews with a mallet and dull large punch or strap wrench.
I chose to drill my pick-up tube hole as close to the highest point of the tank and still be in the center of the tank.My reason was the new pickup tube sits in a grommet that could leak durring a full tank if not sealed or later grommet deterioration.
The pickup tube is supposed to be 1/4 inch from the bottom of the tank I made V notches in the end of the tube.The tank will expand and contract with fuel load and age IMO.
I used some small cut off peices of air dog hose for standoffs with tywraps.
I would recommend hooking up your wiring starting at the power supply (Alternator + and ground at the block, less corrosion than the battery) and routing it around to where you want the relay and fuse to be.
I chose to leave the stock fuel system lines and components in place so I only had to plug off where the line from my filter to the VP-44 was removed.
The air dog uses the wires from the stock lift pump to power the new pump relay.
I have more pictures but could only load up 10.
later all

 

Pictures of Return line plumbing and pump mounting.
There are many different options for mounting there where two different plates provided for every possible situation I guess.
I would have some extra 2 inch hose clamps for the fuel filler neck hose. They give you two clamps,but the dodge clamps that get reused are cheaply stamped and froze up at the worm gear.
The pic of the stock (deleted) fuel filter shows a spacer ( scrounged up from around the shop) used to seal off the fuel system where the line normally comes off and goes to the VP-44. All this stuff ie: lift pump ,filter, old lines could be removed completely if you wanted.
you may need some large wrenches 13/16, 7/8, 1" for the hoses.
well thats all I can think of right now.
Later

 

The gauge is in the pillar pod, There is a 1/8th inch plug at the outlet of the airdog pump body that is actually used for there optional low pressure light,they do give you the wiring neatly loomed back (see pic of pump). you can plumb in a Pressure sender and use the provided wiring or just order the low pressure light kit.
It took me probably 16 hours off and on. My four year old is always so willing to help.gotta love kids take your time.