one or two runs of 1/0 gauge to the rear where you will have one or two large sealed agm batteries. from the batteries, one run of 1/0 to the rd amp and one run of 4 to the pa amp. grounds for the two amps returning to the rear battery bank. you will also need to do the big three under the hood.
and finally...
you will need to find someone to do this for you, for your own safety. you clearly have no idea what you are doing. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif
oh, and fyi, you wouldn't need a fan to keep the amp cool, if your voltage wasn't dropping into the 10's...