Not yet.  I wanted to see if maybe it was sumthing that just needed to b easily troubleshooted.  But im buying a code reader for it tomorrow. 

dont think you need a code reader for it. i beleive you jst need to jumper some ports in the diagnostic test connector....

it is too old to be read by an obd2 code reader

the check engine lights covers a vast amount of issues, usually relating to the emissions control systems, without knowing more or what code it is displaying, we will not have an easy answer for you other than look for having some sensor disconnected that wasnt disconnected befroe you did the head swap