i owned a 66 Polara 500 convertible 4 speed. I bought from original owner. he bought new at Gerdon's Chrysler in Corydon, Ind. it had 383 LOW performance 383 4 bbl with SIngle exhaust!. had console/tach, ps pb. got crushed at Wrights salvage in Louisville, ky. i've 66 converts and 66 4 speeds, but never the combo!. not oone! have searched hard.
i have a 65 300 L 4 speed. I lost contact on a 65 300 L convert 4 speed on 1978 in Louisville. guy took me for a ride and scared crap out of me!.
There were 105 L 4 speeds, 12 convert 4 speeds. 85 300 K 4 speeds and 4 convert 4 speeds exist.
never seen another 65 monaco 4 speed.