That SPD should make it a '67 car, as previously stated, but the Poly says '66. Sounds like a customized car to me.
It's not unheard of for cars built at the very start or end of production to use some parts from the previous or later model year, but the description sounds more like a car that was altered, not produced. I'd be that if you get a look at the backsides of the body side panels you'll find that the molding holes were welded/filled.

That SPD should make it a '67 car, as previously stated, but the Poly says '66. Sounds like a customized car to me.
It's not unheard of for cars built at the very start or end of production to use some parts from the previous or later model year, but the description sounds more like a car that was altered, not produced. I'd be that if you get a look at the backsides of the body side panels you'll find that the molding holes were welded/filled.

There is nothing in the SPD that calls out the build year, just month and day , if it says 929 on the fender tag it stands for 9/29/1965.

Good points by all. The sequence # matches the body. The date has to be 9 29 66 because it has a large 278k in last 6 of vin. I have March and July Hemi Coronets with lower vin last 6. Poly was last year in US 66 and I think Canada was 67. Big Joe was a Chrysler dealer and factory racer so I would think he could order a weird car. Mrs Teuton may have wanted an ac car, they still have a hemi. Will see Lil Joe at our D4 banquet next week and see what light he can shed. I bet that AC compressor weighs 50 lbs. LOL Parts store showed "E" in vin as polysphere. That is followed by 6 which is year. 66 RT?? Cool Car Pun!!! I will try to get some pics.

The quarters are 66, no fake scoops.

The sequence # matches the body

Look at the dash where the half round chrome trim goes over the column, I s it metal or plastic?
Look at the dash colored piece under the column, is it metal or plastic? METAL

Plastic is 67, metal is 66 and they will not interchange. Metal dash frame is different. METAL

Look at steering column, is it painted a satin color or full gloss? Look at column under dash near brake pedal, does it have a part of the tube 6" long that is a mesh? By hat is a collapsing 67 column. STRAIGHT COLUMN

Is steering wheel colored like the interior? Does it have 2 spokes or 3? TWO

Does the console have the end piece bolt on? Look inside the console box and you will see the fast ers inside there on the rear end. You can see the seam on the outside. YES BOLT ON

66 and 67 front fenders are different where headlight buckets mount, weld on in 66, bolt on in 67.

The 66 and 67 heater boxes are different in the way the metal brackets are attached also, need to go in garage and look at that again.

Generally August 1st started the next model year car production.