I would like to set the timing but can't seem to locate the distributor. Where is it located? Do you even set the timing on this car? I can't even locate the numbers by the timing belt to even set the degrees BTDC.

To set the timing on your 1991 Nissan truck, follow these steps:

1. Locate the timing marks on the engine. They are usually located on the front of the engine, near the crankshaft pulley.
2. Remove the timing cover if necessary to access the timing marks.
3. Check the engine's specifications to determine the correct timing setting. This information can be found in the owner's manual or a repair manual.
4. Connect a timing light to the battery and to the number one spark plug wire. The timing light will allow you to see the timing marks more easily.
5. Start the engine and let it warm up to operating temperature.
6. Aim the timing light at the timing marks on the engine and observe the marks as the engine runs.
7. Use a wrench to loosen the distributor bolt slightly.
8. Rotate the distributor slightly to adjust the timing until the marks line up with the specified setting.
9. Tighten the distributor bolt once the timing is set.
10. Recheck the timing to ensure it is still set correctly.
11. Turn off the engine and disconnect the timing light.
12. Reinstall the timing cover if it was removed.

If you are not comfortable performing this procedure, it's best to take your truck to a qualified mechanic for timing adjustment.

Question edited for clarity.
Question moved to model category.

There are two types of 'timing' camshaft and ignition. Lets guess you are talking ignition.

https://www.google.com/search?q=1993+Mercury+Cougar+XR7+V8.+set+the+timing


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Distributors and the cap will only fit one way. Check out the videos in the link.

https://www.google.com/search?q=Where+is+the+wire+located+to+put+distributor+in+neutral+to+set+timing+on+a+1997+Chevrolet+S-10

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The distributor drive gear has angled teeth, so it turns as you slide it into place. Turn the engine over until you are on TDC for number one. Look at your distributor cap and see where the number one wire terminal is. Pull the cap and make sure that the rotor is pointed to it.

Ouch, I would start by verifying you didn't miss setup your timing. It could be off by one or two sprocket locations or off by 180 deg. You might have to pull the #1 spark plug to verify that.

to get to the rear 3 need to remove the intake plenum also the following link will show how to get to the distributor
Replacing Distributor on 2 5 6 Dodge Stratus

Okay locate the distributor and look for a single inline spout coming out of wiring harness to distributor, unplug the connector end , this is like a cap, remove it and set timing then reconnect it,this is located right next to distributor.good day

Distributor Installation
Just to add, I don't believe your timing is adjustable.

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Bring cylinder number one piston to Top Dead Center (TDC) of compression stroke.

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Remove the distributor cap bolts and discard.Remove the distributor cap.

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Install a NEW distributor gasket onto the distributor.

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Align the indent hole on the driven gear with the paint mark on the distributor housing.Ensure that the distributor rotor segment points to the cap hold area.

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Align the slotted tang in the oil pump driveshaft with the distributor driveshaft. Rotate the oil pump driveshaft with a screwdriver if necessary.Align the flat (1) in the distributor housing toward the front of the engine.Install the distributor and distributor clamp.

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Once the distributor is fully seated, align the distributor rotor segment with the number 8 pointer that is cast into the distributor base. If the distributor rotor segment does not come within a few degrees of the number 8 pointer, the gear mesh between the distributor and camshaft may be off a tooth or more. Repeat the procedure in order to achieve proper alignment.

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Caution!Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Install the distributor clamp bolt.
Tighten
Tighten the distributor clamp bolt to 25 N·m (18 lb ft).


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Install the distributor cap onto the distributor.Install the NEW distributor cap bolts. Do not overtighten the NEW distributor cap bolts.
Tighten
Tighten the distributor cap bolts to 2.4 N·m (21 lb in).


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Install the ignition coil wire harness.

If you haven't had the distributor out then turn the cam so the rotor points to No.1. Then yiou should see some marks either lining up or close to it.
If you have had the distributor out, set the cam and then worry about the distributor.
Some engines have more than one possible location for the cam gear. I'm not 100% about Hondas so I can't comment either way. Sorry.