Like I told you when I last looked at your car you need to get the D/S motor mount at the very least along with a boost and tach gauge.
The DR M/M is wasted and you shouldn't be romping on it hard until you replace it. That is likely the false knock like we discussed, but you should also mention to everyone the S/M issues that you are having.
The exaust isn't leaking enough to cause the high BLMs unless it got worse since I looked at the car last time.
It could be a wiring problem or other issue in why the S/M freezes/drops out unless that isn't an issue anymore and is now working like it's supposed to.
I'm tending to think that the injectors might also be an issue like posted earlier by someone else, but I wanted you to get the appropriate gauges and the MM before you went any further.
Your car is all stock, right down to the original MAF. Those injectors are probably not working 100% as they have been in there for longer than you've been alive my friend and if the car sat for a long period before you got it they could be clogged/gummed up a bit.
If it's not an electrical problem the only thing left are the injectors as you have replaced everything else in the fuel system except the injectors. You first have to make sure the S/M is working right so you know that you are getting the proper data from it so people can give you an accurate diagnosis.