If you have to change head gaskets you do not have to remove the timing chain cover.
Zip tie the timing chains to the sprockets. when you back the cams out of the sprockets the tensioners will extend and keep the chains on the crankshaft sprockets.
to release the tensioner to reinstall the sprockets you can use a long pick. You need to feel for the hole in the front of the tensioner with the pick in place pull up while pushing in lightly on the chain guide. It will retract. You are putting your pick in the release screw slot and slightly rotating it counter clockwise by pulling up. You will know when you got it. Also on the Drivers Side you push down with you pick and on both side feel for the out board end of the slot. it may take a few attempts but it works. Use a long pick with a right angle tip and don't drop it.
Hope this helps. You can practice before setting the head in place.