I was looking to keep this one, since it has the flag attach points that the ebay doesn't have, sorry I didn't know about the threads being different on it.
Oh well, the search goes on, time to start looking in the local Bay Area marina's & boat shops.
1965 Chris-Craft Corsair
17.5 Ft. XL-175 SunLounger
225v6 OMC-Buick I/O