Check out this article in Import Car: http://www.babcox.com/editorial/ic/ic40024.htm
It should answer some questions. The rails can not be removed with the gears installed. This means that you do the rails then roll in the chain or you roll in the chain and then take the gears off to remove the rails. There are lots of pitfalls to this job, one does not need the added stress of a deadline to do this job for a first time. Make back-up arrangements for a ride and stop and ask if things don't go right; like ending up one link short when you have rolled the whole chain in. I recommend removing all the rocker arms (both for safety and to ease the force needed to spin the motor by hand). Unfortunately by doing this occasionally one won't recompress when the rocker is replaced causing the valve to be hung open and a misfire to take place. If you get in those positions back off and come back for help and use that ride.