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Found this Answers all my questions

1. For my XT6’s I use the OEM pulleys and inject grease into them with a needle fitting on the grease gun. Lack of grease is the only failure mode. So give em new grease. 2. if I was doing an EA82 I’d buy whatever looks reasonable, check them annually and replace every 50k. 3. I think the EA82 pulleys all have common bearings - just install new bearings or have a shop (bearing shop, machine shop or some mechanics will do it) for you.

Brake problem is a frozen check valve in the booster line. I've had it happen on most of my cars, and have had good luck cleaning it. Pull it off from the booster, and squirt some MAF or Carb cleaner in there, let it sit for a minute and then start the engine, and spray some more through there with the engine running. "Correct" fix is to replace that booster hose. As for your misfire. I'd throw a set of NGK Copper plugs at it, their cheap and easy for that engine...