Some years ago I mounted a Kenwood TM 641 into my 1998 Tacoma. That radio had a removeable front panel. I wanted to do it with as few holes as possible. I wound up drilling only one hole and that was for the power and ground leads to the battery. I realize this is a bit late for you, but it may help others who have the same idea. For me, it was an ideal setup. For you????
Front Panel Mounting
I used a utility box to replace the one below the radio. Then I obtained some plastic (1/8" thick, I believe) and cut it to size to cover the utility box's opening. I mounted the cover to the utility box using a 1/2-inch wide "L" bracket on each side. Next, I mounted a swivel mounting bracket (came with a kit I bought for remote mounting) to the center of the cover and to the back of the front panel. I ran my wiring up to and through a hole I drilled in the back of the utility box.
Radio Box Mounting
To mount the box I simply used 1/2 of a velcro patch stuck to the back of the console and the other 1/2 to the bottom of the radio.
Antenna Mounting
I mounted the 144 MHz antenna to the rear driver's window using a "through-the-glass" mount. The whip was long enough that I could pull it down when driving in and out of the garage. I then mounted the 220 MHz antenna to the same location on the passenger rear window. Next, I routed the antenna cables behind the rear panel to the floor, underneath the carpet and to the radio. I was able to obtain a good SWR without fussing around with them. When I go through low-hanging brush and trees, I remove the 220 stick, and reinstall it when I come out of the brush.
Microphone Mounting
That left only the microphone. The mounting was simple - I removed the little clip from the back of the mic and used velcro to attach it to the center console. The radio body was out of the way, I could still stick stuff underneath both seats, and the radio display was visible without taking my eyes completely off the road.
Since Then
That was all back in 1999. In 2007 I removed everything (still have it all - can't get rid of it). If you know anybody........