Yes to both questions.
87 Caprice uses Throttle Body Fuel Injection. To put a carb on it will also require changing the distributor and fuel pump and disabling the computer. This will eliminate your cruise control and possibly mess up your speedometer.
Change spark plugs and wires, change all fluids, check o2 sensors, distributor and rotor cap possibly, change all filters...and a fat wallet...
On a 1995 Chevrolet Caprice Classic, the distributor cap and rotor are located on the front of the engine, typically near the intake manifold. The distributor is mounted on the engine block, and you can access the cap by removing any obstructions, such as the air intake duct. The rotor is situated inside the cap and can be accessed by removing the cap itself.
Possibly defective or misadjusted brake light switch.
It could be you thermostat Have you have already checked oil level, and/ot changed oil recently Exaust restrictions can cause overheating
Much like a 1975 Caprice Classic
yes
Yes
Yes you can.
None, there is no such thing as a 1998 Chevrolet Caprice Classic
(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
A Classic Caprice is a more upscale caprice, sort of like a separate trim level. Classics included small upgrades to the regular caprice, but not quite enough to warrant a trim designation.