A friends family had a 82 300sd in the garage. It had sat for about 8 years, been driven minimal for about 5 years prior. It's got 145000 actual miles it. I replaced the battery and it started right up and drove 30 miles home. It's a beast! Was thinking of doing the oil, transmission, differential fluid and putting some anti fungal/fuel additive, and air filter. Fuel filter at some point. Any other ideas on major or minor stuff I should do immediately and what other things I should try to do?