There are four spark plugs on each side of your 1991 Chevrolet engine. The spark plugs will be near the bottom of the engine.
The 2013 Chevrolet Spark has an inline 4 engine.
The 2014 Chevrolet Spark has an inline 4 engine.
To add, this is a 5.7 v8 engine.
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The 2013 Chevrolet Spark has a 1.2 L base engine size.
The 2014 Chevrolet Spark has a 1.2 L base engine size.
(This is from the 91 Caprice service manual for the HEI ignition system) Looking at the distributor cap from the front of the engine bay, and running clockwise around the cap from about the 1 o'clock position, the wire numbering is: 3,6,5,7,2,1,8,4
The 2014 Chevrolet Spark's engine produces 84 hp @ 6400 rpm.
The 2013 Chevrolet Spark's engine produces 85 hp @ 6400 rpm.
The wiring diagram from the distributor cap to the spark plugs for firing order for a 93 Chevy Caprice 5.7 liter engine is found at Wiring4cars. You can search the site by vehicle year, make, and model.
The 2013 Chevrolet Spark's engine produces 82 ft-lbs. @ 4200 rpm.