Very Good..

You may want to clear any codes and might even want to reset the HFM modules memory back to normal base line ..[ that will readapt by itself, but it is easier and better to reset everthing after that type repair b/c the ECU was adapting to the old misfire condition], so you know it is spec now.

The new plugs and connectors are maint. items anyway, so no loss there .. and the OVP is changed to the new part# regardless ..I would stash the old one in the Glovebox/trunk as a spare in case you ever need one on the road b/c a bad OVP on an HFM/SFI can stop the car dead.
You may also want to compare your old coils to the new for Resistance values , with the secondary windings being the ones of most concern.
They will be in K-ohm.

..PS

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I see you have another addition aside from the 121 barn find..........
How do you like/dislike the Boxster???
I am thinking about one.

See ya

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A Dalton