Before I write this I have to recommend that you get a "Haynes" or other manual which will have pictures and diagrams. Also any decent replacement timing set will include an instruction sheet. I will never install a used timing chain or used wear guides on one of these engines because it is just too much work to go back and do it again later. I also would never install a head on one of these that doesn't have new valve guides & a fresh valve job for the same reason.
Here you go:
Set #1 cylinder to top dead center
Chain Tensioner retracted for assembly
Exhaust cam actuator is manually fully advanced (hold cam with wrench on flats & turn the sprocket fully clockwise)
Crank sprocket timing mark centered on dark chain link
Flat on back end of both cams are on top and horizontal
Both cam sprocket timing marks are centered on a dark chain link
Front lobe on both cams are facing straight up
Release chain tensioner after chain & wear guides are installed
The word "Delphi" on side of exhaust cam is parallel with the flat rim of the head
If all of this is true it is in time!