Why?, I didn't really like the OEM one. And got try of taking off the OEM one every time I covered my car. So after looking into the space I have to work with & what Power (automatic) Antenna's was out there. This is what I came up with.
WARNING mod is not for the faint of hart. You'll need to drill 3 holes & endlarge one.
Tools:
jack & jack stands & lug wrench
socket set; 1/4 drive, 7mm, 8mm & 10mm
screwdrives; #2 phillis, 1/4 flat head & Panel removal tool.
wiring; soldering gun or iron & wire strippers & solderless connector crimpers, multimeter.
Drilling; 90deg. drill is best, but a small reg. drill will work. 1\8" & 1/4 drill bit & 1/8"-1/2" & 1/2"-1" step drill bit.
Supplies:

Antennaworks; Remote motor fully automatic AM/FM Antenna (MFG part#44-PW6) I bought mine at J.C.Whitney. (Thier catalog #830048)
solder, black tape, heat shrink, quick disconnects solderless connector, zip-ties, black RV sealent, small push on/push off switch, Motorola to male BNC RF adapter, Solderless UG-88 male BNC plug, female BNC connector & masking tape, two 6mm bolt. no shorter then 30mm with matching nuts & washers.
If I forgot anything, look at the pics. or PM with "?".
Let's get it started;
1) Jack up right rear of car & remove RR tire. Place jack stand under frame & let car down.
2) Remove inner fender(IF). There's 2 10mm bolt to frame & 4 push in plastic retainer's on the rear of the (IF) & 3 in the front & 3 under the rocker panel.
3) Pop the tunk, remove rubber bolt protector & the 10mm nut that hold the elastic strap to the top. Pull out the tops drain tube. Then pull back right hand side truck cover. You'll see the OEM connector. Disconnect it & push the wire & rubber grommet threw the truck tube. Remove the antenna's top retainer nut & the two 10mm nut & bolt under neath.Now you can remove the OEM's antenna from the car.

4) Take out you new antenna. Read the install paper work. & deside 1 of 6 mounting Base's you want to use. I use the Flush adjustable one.
5) The base I use. Requires a 1" hole. To do this right. I put masking tape over the OEM hole & used the 1/2"-1" step drill & drilled out the OEM hole to 1".
6) The 2nd hole is 3/4". I used both step drill bits. Look at pic. to get a idea of where to put the hole loc. About 60mm high, 50mm over.

7) Take your antenna apart, 1st remove the antenna's retaining nut. 2nd touch the blue & red wire to the + post of the batt. & then the black wire to a good ground. This will raise the antenna & remove it from the motor cable assembly. 3rd remove the 3 P#2 screws at the bottem of the antenna housing & the cable meet. Remove antenna housing. 4th remove the 2 P#2 screws that hold the cable to the motor.
