Electrical/Ignition issues. Please help

[Rod80SC]

This all started back in december and I have been stumbling and bumbling and dumping money into her since then.
First symptoms were jerking, coughing, fluctuating tach and stalling after warm-up. I could nurse it home if I just idled. Any attempt to accelerate would kill it. Other times it wouldnt restart at all until it sat for 5-10 minutes. Then start fine but unable to accelerate.
Heres the wierd part....when the tach starts to fluctuate the brake and oil light also flash.
First thought was coil so instead of replacing with stock I did the winter MSD conversion along with plugs, wires, cap and rotor. Following first test drive exact same results. Started great ran fine until warmed up. Pouring over the archives here I found the culprit may be the green wire. Repalced that and still have the same results.
Thoughts.....how does the brake and oil light tie in with all this (obviously a ground somewhere).
14 pin connector ?

Any help or advice is greatly appreciated.

[HardDrive]

Have you checked the output from the voltage regulator? I will bet you a beer that either the voltage reg. has went south or the entire alternator is shot. I just had my alternator replaced ($380 installed, rebuilt). My tach was occasionally going bonkers, and the 'protection' circuit on my stereo amp kept kicking in. It could have been just the regulator, but I opted to do the whole alternator. Cleared it right up.

The car actually runs and idles better since the change.

[Rod80SC]

Hmmm,
Wouldnt have thought of that, but will definetly look into it.
PO said the alternator was replaced just before i bought the car.

[Rod80SC]

Bump for the saturday crowd.

[Rod80SC]

Another bump for the suday eve crowd.
could really use some advice on this one.
thanks