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Hello and thank you for your question,If you pull the coil wire off of the coil and crank the engine over , do you see a nice blue spark out of the coil?
Yes you will need someone to crank the engine over for you while you watch for fire out of the coil.
In most cases the loss of spark on your 1989 is usually due to a failing ignition module and in most cases due to the age of the truck you should also consider replacing the distributor pick up coil located inside of the distributor when replacing the module.
Yes, you need to line the rotor up with #1 on the cap, remove the distributor and then remove the roll pin from the drive gear and the gear has to be pressed off. Once the gear is off the shaft come out to access the pick up coil.
Yes it actually would . Save you a lot of head ache if you do not have access to a press .
To time it, remove the SPOUT connector that should be taped to the harness the the ignition module and once you have the distributor set at TDC with the rotor pointed at #1 on the cap start the engine and set base timing at 10 degrees BTDC and tighten it down. Then reinstall the SPOUT connector and your good to go.
Actually #1 is marked on the cap and once the rotor is pointed at it the timing mark on the harmonic balancer should point at 0 degrees which is top dead center.