Brands that I've had good luck with:
Timken or National for bearings & seals
Carter fuel pumps (USA)
Purolator, Motorcraft, Wix oil & air filters.
Fram "Tough Guard" filters are also decent, it's their (cheaper) "Extra Guard" oil filters you don't want anywhere near your engine. If this is confusing, then yeah, just avoid Fram entirely.
Motorcraft for fuel filters (USA).
Bosch for ignition parts (wires, cap & rotor, etc.).
Motorcraft or Autolite spark plugs (double-platinum).
LuK clutches.
Raybestos brake rotors*
EBC for brake pads
Gates, Dayco for belts.
Energy Suspension and Daystar for bushings & drivetrain mounts.
Spicer u-joints.
Toyo, BF Goodrich, General Grabber tires (STAY AWAY FROM GOODYEAR if you don't enjoy driving on oval-shaped tires!)
Skyjacker for TTB suspension lifts.
James Duff is good too (perhaps also with slightly tighter QC), though getting single replacement parts from them has been difficult in the past.
Fox, KYB, Bilstein for shocks
* Be sure to remove the (China) junk bearing race from any new brake rotor you buy and replace with the matched race from a quality USA bearing set such as Timken. I believe these pre-installed races to be a source of the front bearing issues sometimes seen on the '83-'97 trucks (why these are put there I've no clue... It once was common knowledge to not mix bearing cones & races of different brands, but I guess somewhere along the way that went out the window).
Do not use FourSeasons a/c compressors! Which is unfortunately the only option at most local parts stores.
Interesting... Did they recently go downhill?
I replaced the FS-6 compressor on my '90 back in 2008 with a Four Seasons that I bought at a CarQuest store (mine was supposedly a new (not remanufactured) unit made by Visteon (rebranded), which I recall is who made the OEM units). So far all this time it's been good...
(the replacement hoses I used also were Four Seasons)
What brand batteries have you guys found not to suck. The "house brand" at advance and autozone are worthless piles of garbage. Back in the day diehard and interstate were awesome, not sure anymore. Optimums quality I've heard has gone to hell but last one I had was when they first came out and were freaking awesome.
Pretty much every battery priced less than $200 sucks now compared to batteries (even sub-$90 ones) that were out 15 years ago, probably partly due to the higher levels of recycled lead used nowadays (apparently it is harder to get all the leftover impurities out of it or something).
The vast majority of batteries currently on the market are produced by Johnson Controls regardless of their brand or labeling (a distant 2nd & 3rd are Exide, and East-Penn). The JC-made units seem to outnumber all the others combined by about two-fold (just going by what I see available on store shelves without actually researching the numbers). For any normal-duty application (a sedan, our RV, etc.) I just go straight to Costco for their Kirkland-Interstate brand units (made by JC) (Walmart's Everstart brand is a good 2nd choice for those without a Costco card). They seem to last decent (4-7 years or so) as long as the charge is topped off overnight once in awhile, and they aren't subjected to too much vibration. Nearly all of them eventually seep a little acid from underneath the vent caps (causing terminal corrosion and tray rust), requiring some teflon plumber's thread-seal tape be put around the cap plugs to reseal them (this happens often enough I just do it proactively on any new battery I buy now).
For my BII I finally broke down and went with Northstar X2 units because I heard good reports about them and I could no longer keep any battery less than $150 working for more than 2 years (every time it was a single cell that would shit out, probably because everything is made less-tolerant of vibration now). I'm only 1.5 years into owning them, but so far so good (better effin' be for what they cost). If they last at least as long as the old Delco Voyagers made before 2006 or so did (8-10 years), I'll be happy.
I understand Optima's quality has come back up somewhat, though still not quite what they were in the beginning. Given their space-inefficient round-cell design that lowers their amp-hour (or reserve) capacity relative to that of a flat-plate battery, I still won't buy one.