Timing is at 19* / Jumps around to +40* !

Just set it with the spout out and forget it. that a lot of timing.. My car slowed down anything above 16 degrees.. Are you just changing the timing around and listining or actually dyno or track tuning the car, cause if your just listining in the driveway your never going to really no if your making progress..

Eh, i guess whatever works. Me personally, i would try to get it to run without breaking up at 10 degrees first.. whatever it is could be costing ya a lil more HP. I was lookin at your car domain site, and Its actually a pretty good build up, Def a sleeper...

If it was me I would think the timing has skipped at the timing chain or the distributor is a tooth or so off. Usually anything over 18 degrees you gain nothing but if it skipped timing retard direction I can see your car running better when you advance.

I'm going to repeat what Quikstang said - set the engine timing with the SPOUT out. The SPOUT signal is what the computer uses to advance the timing. There is a considerable difference between the SPOUT in and out readings, which is the way it is supposed to be.

From you picture posted on the Corral, the air intake in the engine compartment is a definite no no. This has probably done more to create your problems than anything else. The wash from the fan upsets the airflow through the MAF and causes strange problems. It picks up hot air from the engine compartment. The stock setup is better than what you have now. It doesn't have the fan wash problem and it picks up the cold air from the fenderwell. Pick up some PVC pipe & flex duct from Home Depot or Lowes and fab what you need to move the filter to the inner fenderwell.

I will tell you that there is no such thing as "one tooth off" on the distributor position. As long as you can get the timing set (with the SPOUT out) to properly line up with the marks, it is good.