Typed up a couple remarks here and. POOF, it was gone.
So now the condensed version.
The Torsen for your car is the best choice, and I didn't realize they fit up to 2000, and at 75 bucks is the best deal, steal of the year so far.
Lube, they run a straight gear oil, no modifiers. Check for what is recommended.
I've had great luck at Tom's for rear parts.https://tomsdifferentials.com/
Think about using a solid instead of a crush spacer at the pinion.
All in all an easy install, no pinion depth to deal with when reusing the "old" 3.73 R&P.
Reweld the factory plug welds at the centersection, they can seep oil. Clean the flux from plug welds left over from their welding.
LPW is good, with the carrier cap bolts. I used ARP cover bolts but they were cheap, and cool back then
Remove the rear from the car and put it on a set of sawhorses. Cranking down on the pinion nut is the only thing that requires more hands when the rear is not in the car. You can make a pinion yoke holder wrench from a long piece of angle iron. A friend has an old Kent-Moore pinion flange tool i borrow.