1993 Buick Park Avenue Newfound severe stalling issue after

I have a 93' Buick Park Avenue with a newfound issue which I will describe in full to the best of my ability after I first detail what work I just had done not more than a month ago.

1) Install ECH C S Sensor
2) Replace Ignition Module
3) Replace Intake Gaskets
4) Replace Plenum Intake
5) Replace Throttle Position Sensor

Fuel Injector O-rings/Bypass Horse/T-Stat/Seal T-Stat

6) Oil change/filter
7) Replace Plugs & Wires (AC Delco/Belden Wires)
8) Repair Power Steering Cooler Leak
9) Install AlternatorCN
10a) Install Fuel Pump
10b)+ Fuel Sending Unit
10c)+ Fuel Tank Straps
10d)+ Fuel Line Connector x2

Over the weekend I had to pull off on the highway. I had to gun it to get back on and got to about 70-80 in what seemed like maybe 5 seconds, which obviously topped out some RPMs. The car has since sounded like a motorboat with a short timed repetitious stuttering sound. When I reached Benton Harbor and made my way down the offramp to Pipestone the car died at the stop sign. And subsequently every single time I've had to brake since. I've watched my oil pressure fluctuate wildly during the past day or two, all the way from 120 for a short while after I added a quart of oil, down to the red zone when I'm not applying gas. The car also dies out if left at idle.

Some of my precursory research shows that all of this might be related to the vacuum system having a leak and thus having to go way above and beyond to try and actuate the brakes which kills the rest of the system. Another option showed the Torque Converter Clutch or TCC Solenoid could possibly be at fault, improperly disengaging/engaging the transmission from stop & go duties. Additionally, the odd new sound has my mom suggesting the unthinkable of a thrown rod.