FWIW... I don't want to start a holy war here
and yes you can call me ignorant...

I'm just stating my opinion based on years of dorking with
these things..

If nobody else agrees that's cool....

But I think the 3 speed wiper motors on these cars suck....period.
Even brand new/rebuilt working perfectly, brand new switch blah blah
blah, they are lame by today's standards...

I understand this is all due to the design of that time period which is voltage through the switch...

I've never dealt with a 2 speed so I can't comment on those.

I've dealt with A-body B-body and C-body 3 speed motors,
and none of them are anything to write home about..
They are barely adequate AFAIC...

The park mechanism is easily broken.

It doesn't matter if you have an alternator upgrade or
any other electrical upgrades (MAD electrical upgrades etc.)
There is nothing that I've seen or heard about that improves the wiper motor performance to match today's cars..

Again, this is by design (all the voltage through the switch with resistors in the switch etc...)

True, they work...but I'd take the wiper system of my 2000 Buick century or my 2003 F-150 in a heartbeat if there was a retrofit kit
available...

anyway...just my 2cents...