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Seems to me the Z shaped distributor wrench is still a 9/16th in 1989. Fuel filter R & R can be done with 1 metric and 1 SAE sized line wrench, I forgot which fitting is which. 02 sensors are 7/8.
you`ll find basically everything on the chassis and drivetrain to be metric, except for internal engine pieces, and most things that bolt directly to the block/heads, which will still be SAE...
you`ll find metric bolt sizes 7, 10, 13, 15, 17, and 18MM are most commom, an Torx sizes 10, 15, 20, and 27, to be used often...