Need help to ID Farmall

A few years ago I went on a antique tractor purchasing spree. I purchased 10 with the intent of refurbing them and reselling as a small income source during retirement. About a year ago I finally got around to starting and recently completed a 1948 model B John Deere and have sold that. Now I'm on to what was sold to me as a 1953 Farmall Super M.
Well, that may not have been the entire story. It turns out that the Model/Serial tag reads SM D with serial # F-36665 J. So, it looks like at least the clutch housing is from a diesel? (that casting is marked with what I believe is a code "Y".)
I have found what appears to be 4 different casting codes, F, I, L, and Y on various casings. "F" on rear axel housings, air filter/front tank mount, right wheel, and the bolster. The "I" appears on the water pump housing. The "L" is on the transmission cover and the pulley gear housing. And the "Y" is on the transmissions casting, clutch housing, and the left wheel.
The Engine numbers are W KM19516 W1.
Question; what in the world do I have??? I am not new to mechanics but very new to this refurbishing game. Any help will be greatly appreciated!

Diesels had an exhaust that came up and out
the (right) side of the hood. Gassers had
an exhaust that came up and out the (left)
side of the hood. Therefore, the hoods are
different according to where the exhaust
hole is at in the hood.

Diesels were also GAS start. Meaning that
even though it was a diesel engine, they
still had spark plugs, carburetor, and
ignition system for the gas start. Fuel was
switched to diesel once engine was warmed
up on gas.

As for the numbers, I'll let someone else
answere that. I don't have any books to
make references to.

You have a tractor built from parts. A regular "Johnny Cash" machine, referencing the song "One Piece At A Time."

Y is 1953.
L would be 1942 or somewhere up in the 1960's, like 1966.
I might be a T which would be 1950. I would be 1937 or 1938 which is before M production even started. Odds are you don't have pre-production parts. The other option is 1963, which is after even 560 production stopped.
F would be even further back in the 1930's well before the M was even a gleam in Raymond Loewy's eye. So it would have to be 1960, which I guess is possible as the 560 was still in production at that time and rear axle housings from a 560 would fit an M.

The serial on the engine is pretty low, and I think it's out of a W6. What's the date code on the block?

You have what n series Ford guys call a
franken tractor. One made up of different
parts or different model years

In my opinion if he knew enough to rebuild or redo a JD B I would hope he could tell if this tractor had an injection pump and lines to know if it is a diesel.

Your right, but, boy you can sure here it all on here. LOL. And some people don't know anything about a diesel.

This is not a diesel engine. However it appears to have been mounted to a diesel clutch and transmission.
I have not been able to locate the date code on the engine block. Where is that located?
This is obviously a "FrankenFarmer"

You have a SMD with a W6 engine.

Those IH diesels had an injection pump and carb/distributor.

Engine serial number started out being a 1948 W-6 engine gasoline fuel. Engine was early in year so may have a previous year letter on block. Look more to rear of where the serial number was between metal side cover and head. Unless they cut a hole and used the SMD hood the front bolster would need changed for a gas hood to fit, unless a SMTA one or modified hood. F castings were from 1960 so they would need to be from a 560 if the letter is correct. One problem if a F is on the tank and steering support it would need to be a later replacement part from IH. None were used on a tractor that could work after 1958. Clutch housing is a late enough so it and a gas SM that late used the same housing. Uses a 3 bolt starter. Does it have a diesel starter or other? Does it have a hydraulic unit under fuel tank? Diesel fuel tank will have two line holes in bottom, gas just one. They could use diesel tank by plugging the extra. Could the I be a R missing part of it?

(quoted from post at 16:45:26 09/12/22) Engine serial number started out being a 1948 W-6 engine gasoline fuel. Engine was early in year so may have a previous year letter on block. Look more to rear of where the serial number was between metal side cover and head. Unless they cut a hole and used the SMD hood the front bolster would need changed for a gas hood to fit, unless a SMTA one or modified hood. F castings were from 1960 so they would need to be from a 560 if the letter is correct. One problem if a F is on the tank and steering support it would need to be a later replacement part from IH. None were used on a tractor that could work after 1958. Clutch housing is a late enough so it and a gas SM that late used the same housing. Uses a 3 bolt starter. Does it have a diesel starter or other? Does it have a hydraulic unit under fuel tank? Diesel fuel tank will have two line holes in bottom, gas just one. They could use diesel tank by plugging the extra. Could the I be a R missing part of it?

Click to expand...

3 bolt 12 volt start and one hole in fuel tank. The "I" on the water pump is quite distinct. There is no hydraulic unit.
Thanks for your help!

We had a kid one time we had told that diesels didn't have spark plugs or he was told this. We played the trick about that with the MD as it has all of that on it. He was a bit confused to say the least. We had a good laugh. It was a bit of a had to be there thing.