Group,

Welcome to the forum, 71vetteowner!
Check out THIS THREAD...it may give you some ideas.
It sounds like you've checked all the basics, except the cap/rotor/points. Which cyl. is not firing? What was the compression on that cyl., compared to the others?Adams' Apple2006-10-25 18:15:37

Thanks for the link.  As it turns out it is also my number 8 cylinder.  When I checked my compression, I checked it against the manual, I did not compare it against my other cylinders.  I will check against the others to see.  If I am still getting spark - could it stilll be the cap, rotor, or points?  Thanks agan for the reply.

Is your car a big-block or small block?
The amount of spark would be the deciding factor. If you grab the wire with it off the plug, with the engine running, and it knocks you over the top of the car, the spark is fine. (sorry....I couldn't resist that one...)

The spark should be a nice, pretty blue color as it jumps the gap on the plug. The spark should be able to bridge the gap in the plug easily. A small, yellow spark is not good, and indicates a lower firing voltage.(coil/points) If you swapped the wire, and the plug, that would pretty much eliminate those two things.
The cap could cause a lowered voltage to the plug.
If there is a vaccuum leak around the cylinder, it could cause a miss, but the plug wouldn't be fouled/wet, normally. This would create a lean condition, not a rich condition.
The plug being "wet" indicates either too much fuel/too little air, or too much oil entering the chamber.(or low firing voltage/spark) It the plug oil wet, or fuel wet? Black, or tan in color?

I had a vacuum leak earlier this year that was causing one cylinder not to fire.  Are your headlights coming up an down quickly and wiper door working?

I would make sure your plug wires aren't arcing. Check your wires in the dark and look. Maybe a good tuneup or plug wires would take care of it? my7T12006-10-26 14:32:57

Plug was "wet" with what? Oil? Fuel? Water?
If it had excessive fuel on it, the problem will not likely be a vaccuum leak.
A vac. leak in the area would create a lean condition, and the plug would be dry and white.
If it had excessive oil on it, that could mean a valve guide/seal problem, or possibly piston ring damage/wear.
Water on a plug indicates...well...water in the cylinder.

Checking compression on two side-by-side cylinders is not a good way to determine the condition of either cyl. If the gasket is damaged/leaking between the two cylinders, the compression may well be the same on the two, depending on the firing order of the two cylinders, in your case cyls. 6 and 8. Since these two cyls. fire apart from one another, the valves on one will be closed while the other is on a compression stroke, giving a decent reading. I would recommend taking a comp. reading on ALL of the cylinders, to get a better idea of the condition of the one in question.

You may have a carb issue that is causing your miss/no fire problem, especially if the plug fouled out that quickly.
To check overall engine vaccuum, you need a vaccuum gauge, connected to the intake vac. fitting. A decent engine should have around 16-18 inches of vac. at idle, depending on ignition timing amd camshaft specs.