I just got myself a 325,000 mile original engine (running) 1999 3.4L 4x4 4Runner. In the past I've been a snob about how I only love the 1st - 3rd gen pickups and 1st - 2nd gen runners, I have now seen the light. I've been lurking here doing some research into what I need to take care of first. I'm definitely going to do the Taco brake swap and check out my ball joints, after that I'll have to look into why it had a P0171 that hasn't come back since I reset it. I'm mostly here for a bit o' friendly advice on things I may have overlooked while reading the FAQs here. Honestly the engine is running great right now even though it was running on 2 quarts of sludge when I got it, good gas mileage and all. I still haven't had time to get it on a lift but I'm going to make a boring list of things I plan on doing because I feel like typing tonight! If ya'll have the time to read it please let me know what I'm leaving out. Brakes & brake fluid + clutch fluid flush Rear springs Suspension inspection & alignment if all is well Tires after alignment Air filter Compression test Plugs and wires Throttle body & injector cleaning Coolant flush Fluid drain & fill in all gearboxes Frequent oil changes until the sludge is taken care of (10w-30 once the weather warms up?) P-brake dash light intermittent short fix (Only elecrical issue so far!) A/C diagnosis & fix I'm wondering if anyone has any guesses on how long this engine might last before it takes a dump on me? I'm really hoping (praying) to get some good miles in before I need a rebuild or replacement. Pics coming soon because I'm proud of the moss growing on the roof.