Change or at least have spare fuel filters in the car. Then search on the problems you see in your car that you want to fix. Drive train is bullet proof & you won't have problems that leave you stranded if you keep the fuel filters changed, glow system working and use good judgement (differs slightly from common sense which isn't common). Acquire a factory service manual for your car. Don't waste your $$ on Chiltons etal.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.