I'm reinstalling my stock flywheel because my current aluminum one is giving me vibrations because I think it's not balanced correctly.

My question is when re-installing the stock steel flywheel can it only be installed one way? I mean is it keyed or does the bolt pattern only allow it to install one way or is it installed in relation to top dead center?

 

The flywheel will only attach to the crankshaft in one position, as the bolt holes are unevenly spaced.
BTW, what brand is your alum. flywheel? If it is neutrally balanced, you have a problem

 

Actually, the bolt holes are evenly spaced (at least on my '94) but there is a dowel pin between two of the holes.

 

Exactly!