Well, AFAIK, in 1966, while the lesser Polara was offered with slant 6s and the 3-speed column shift manual trans (and believe it or not, a rare 3 speed no console floor shift option), the Monaco, in Canada, being the top level trim package (like the USA Monaco 500), was offered only with a 318 Poly as the base engine, and included buckets and console, with either an automatic or 4 speed (4 speed was 383 or 440 only).
Now, if you and/or the dealership person knew what boxes to tick, you could theoretically order a Monaco with a 383, ABD console delete with a column shift 3 speed manual or automatic, or even weirder, a console with a shifter delete plate (yes, it's true, I have two of them in my possession) and a column shifted auto or 3 speed manual, but the hoops one would have to jump through to successfully order such an oddball would be even more unlikely than the car being ordered with a 4 speed.
So, I guess never say never, but the only way to verify would be to see the fender tag.
I like pot stirring too!!