And one more thought, for whatever it may be worth
the 4 cylinder engine has a tendency to "vibrate" at low rpm while driving in gear. It has to do with the frequency of the cylinder firing events, 2 events per engine rotation (720 degrees per full cycle divided by 4= 180 degrees per cylinder, 2 pulses per revolution).
so with that, below about 1500 rpm they vibrate terrible if you're still in gear. With a performance aluminum or even steel driveshaft, they do not have the dampener ring on them. That ring does 2 things. One, it reduces the shock loading on the rear end and also the transmission (to an extent) when lugging the engine below about 1400-1500 rpm and two it helps to reduce the "felt" vibration in the car at those lower speeds.
So if you can find a fox body specific 2.3L 5 speed driveshaft assembly, grab it-and look closely at the dampener. If the dampener is falling apart, like mine did, you'll have a fun time finding a new one. If you find one and it ain't tore up, you're good to go.
keep in mind that I drove mine for 8 or 9 years as a cheap daily driver, both N/A and turbo. I did my best to make it get good MPG, with the N/A engine I was seeing an average of 31 mpg, and in doing so I learned quickly that keeping the RPM down helps MPG quite a bit--that's how I discovered the dampener ring issue. By the way the turbo engine averaged 27 mpg, which shocked me! 250% more power and only 3-4 mpg less.