Spark plug thread inserts., Should I be concerned? Options

[Erben914]

I have my engine out for a bear tub restoration. I am reassembling everything and almost ready to put the engine back in.
As I was cleaning things up replacing the tube seals and getting ready to adjust the valves I found these threaded sleeves in my spark plug holes.
Looks like a PO was a DA?
Did they strip all of the spark plug threads and use threaded inserts?
I probably wouldn't have even noticed but they are loose and partially back out when I took out the plugs.
They are at different depths now but do they bottom out when the plug is tight?
I can't tell because the base of the plug covers the sleeve when the plugs are in place.
I really don't want to take the heads off. I had no issues prior.
If it ain't broke don't fix it?
Or am I risking a bigger problem?

[Erben914]

Hey any tips on pulling the head? I know to keep the push rods in order. Anything I need to mark or take a picture of before I go at it??
Sorry to be such a rookie.
This is uncharted territory for me.

[Mblizzard]

Hey any tips on pulling the head? I know to keep the push rods in order. Anything I need to mark or take a picture of before I go at it??
Sorry to be such a rookie.
This is uncharted territory for me.

Make sure when you put it back together you get the push tube retaining springs in correctly. Had to check and redo mine a couple of times to be sure they were right.

Check your valve guides if they go to the shop, just plan on replacing them. Inspect your exhaust studs carefully. Use the good Viton oil tube seals. And take the heat shield off the bottom side of the head before trying to pull it off. Makes it much easier! (IMG:style_emoticons/default/headbang.gif)

Plan on replacing all of the cheese head tin screws with stainless steel hex head ones. Use anti seize on everything!