On the note of that 65 Ambassador. If the price was to stay low enough for me to actually buy it. I would use it to turn my Conv into a 990 "H" convert. Although now that I think about it, If I was to do this I would have to find an "S" to use instead of the "H" to designate a Loaded Softop :] Or a "P" for Propane powered! Buick had some "S" types that I might be able to snag the insignia off of.
Find an "O", put all the letters on at once, you'd have "POSH", about what a full-boat Ambo convert would be anyhoo.