Should be a different thread, not add onto another's.
And hopefully this does not come across as too grouch, but a bit of self research is beneficial to you as you understand what you are doing better.
So, look up the 243 on Wikipedia, that will tell you what its parent case is. then you know if it works or does not with minimum mods.
Do you need a list of all the tools?
As noted per Teebird, get the action wrench, NSS has by far the best one (IMNSOO) as its is setup as good as you want for a vice and worst case if you don't have that and can clamp the barrel it has a handle.
Other tools needed so how detailed do we need to get?
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