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Quick Drain Oil Plug IO390

I want to install one of these but the applications shown on Spruce's site (https://www.aircraftspruce.com/catalog/eppages/safOilDrainValves_07-00879.php?clickkey=92892) do not indicate this is applicable for the IO390.

If it works on the IO360, will it work on my IO390?

It should, see the parts catalog for the IO-390-C

https://www.lycoming.com/sites/default/files/IO-390-C Parts Catalog PC-IO-390-C.pdf

Pages 38 & 39, drain plug is listed as a 1/2-14 NPT (STD-551 PLUG, 1/2-14 NPT, square head, drilled)
 
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A lot of us use them on the IO-390, works great, mine is installed forward left drain port.
 
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