Use the stock harness and modify it to fit the motor. I don't think p/s will fit but it would be good to ditch it anyways. A/C can be kept with the HCP A/C mount.
In a follow up to your pm, if boost is in the future I'd go with the gsr swap, especially if you want to keep a/c when boosted.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.