[Shotimes] Need Help --- No Start --- Distributor? (ot)

[van Oss]

I've just finished replacing the head gaskets on a 3.8L SLO.  Everything 
went back together just fine, no leaks, but the engine will not start.  I 
confirmed the plug wires are connected correctly and there is fuel pressure 
at the schroeder valve on the fuel rail.  Didn't get a chance to check for 
spark before it got dark.

I have a theory on which I ask your advice.  I don't know very much about 
mechanical distributors.  I had to remove and reinstall the mechanical 
distributor.  When I did removed it, I forgot to remove the cap and check 
which way the rotor was pointed.  When I reinstalled it, I think I might 
have got the drive gear off by one tooth or more.  Wouldn't that mean that 
the plugs are not getting spark at the moment they need it?

Can someone tell me how to correct the timing, or recommend websites where I 
could get instructions for correcting this?  I have a timing light that I 
have not used in years.

VO