Can someone tell me what direction the spark plug electrodes should be facing in the combustion chamber?

I think you are referring to "keying" the spark plugs. The idea is that the spark (or ground electrode tip) faces the incoming fuel/air mixture, rather than the electrode bend. You would have to use washers to change the plug rotation once it is tight. A quick google search revealed the link below - which is a pretty good explanation for what I think you want to do.

My 02¢ is that it's not worth it - but maybe forum members have tried it and had success.

http://www.fordforumsonline.com/foru...tra-power.html

I can't imagine this could produce any extra power at all. Remember the piston does the end of a downstroke plus almost an entire upstroke before the spark plug fires after the valves close. That is a lot of mixing already not to mention that the intake manifold doesn't point air directly in like a pipe. The two valves are obviously circular and air goes 360 degrees at a broad angle not directly at the spark plug. Just my opinion based on pure conjecture.

Indexing the spark plugs does help a little, on a stock engine the gains are unnoticable.

Thanks for you all of your input guys!
I am going to try it anyways to see if I can notice a difference in smoothness.

Changing the spark plugs in this car is already a task in itself, trying to align them seems like a lot of work. Best of luck though

some people just got too much time on their hands

it's even less helpful when you have 2 plugs per cylinder.