so have my headunit, went the alpine ida-x305s, gonna run a LLC to use the ICC as a aux input but also lookin at a 5 channel amp with full speakers and a sub down the track but for now was thinkin about how to hook up the factory speakers to the headunit. was considering running new cable from the HU to the speakers and retain the factory wiring from the ICC but thought it may have noise.due to both using the same speakers..

any thoughts??

May I suggest that you get a line level converter, and hook it up to the speaker output from your ICC. Run that straight into your new headunit using and RCA to 3.5mm converter and put it in the aux channel of your headunit (if it has one!!)

Then you are free to use the old speaker wire that is already run for your new headunit, or run even new stuff if you feel that way inclined....although I would suggest that you run the new speaker wire when you get your new amp...

I have a line level converter ready for the job, was considerin runnin the speaker wires from the icc purely to the line level and runnin new wire for now to the speakers from the head unit and when I get a suitable amp then runnin the wires from the amp to the speakers