Update:

After checking with two companies that make spark plug inserts, I can't get one big enough to rethread the hole and use a new insert. I took the loctite-type stuff that came with the helicoil I bought and screwed the old insert back in with that. So far it is holding.

I checked PNP's inventory for anything with an M130 engine and they didn't have it. How hard is it to put an M110 head on an M130 short block? Not that I'd do it, but I might want that information to give to a potential buyer.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Can't be done. M110 is a twin cam whereas the M130 is a single cam.

I do have a 95% complete M110 looking for a good home.