[aftermath]

Its making more sense now, its not just a alarm but its a starter also. This explains the wire into everything like guages, clutch, etc.
My 930 CD has a directory I missed thats called electrical, I only picked up on that when I was coping the cd to the laptop. That might have info to help me.

Here is the plan.
1) Remove heat and AC systems and wiring. At this point Im just simplifying the car as its first year will be driving in nice weather at the autocross, etc.
2) Remove all traces of a stereo.
3) Finish the bits of alarm\starter wiring thats crossed between different wire harnesses ( there was lots ), then pull each harness and fix on the bench. I solderd a few repairs laying under the dash and its not the way to go.
4) Figure out the few missing wire items. Like where the heck is the fuel sending wire gone, which wire will provide power to my ignition box and fuel pump. Where is the other end to one big factory harness thats behind the brake booster.
5) I might need to buy a harness for the door to run the windows and mirrors, its a MESS

Im plugging away at this.