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I'm looking for a photo or illustration that shows the 1934 air pump that was an option(???) on the Standard Eight.
Was it the same for Super Eight?

West, come on now, - you know better. The 34 1100-01-02 was an Eight or perhaps a "standard" Eight but not a Standard Eight, that designation went by the boards after 1932.

Are you referring to the transmission-mounted air pump? You and I had a rather lengthy exchange some years back about the transmission-mounted air compressor and as I recall (memory a bit dim on this) it was last offered on the 32 models that retained the old 4-speed non-synchro unit early in production (the 900 and Twelve came with the 3-speed from the get-go) and as standard equipment last offered in the 6th series. If you examine a 32 and up 3 speed senior gear box there is no provision for an air compressor mounting and unless I missed it I see no mention of a transmission-mounted compressor in the 33-36 Eight and Super Eight Parts Book.

PS - in one of Packard's special tools catalogs there is a photo of a special tool to assist removing the 4-speed trans from a 9th series and you can quite clearly see the blankoff plate where the compressor would mount.

Is this the unit in question?

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Thanks, Dave.
Yes. I recall our conversation now. I was just asked by a museum in Florida that has a 1934 Eight if I knew where an air pump can be obtained. They said that the one that was on the car was removed, and lost. If there was no provision, I wonder what this car had.????

I'll have to call back now and find out if it was a transmission-mounted pump, or something else entirely. Not knowing very much about the 1933-34 engines, I was assuming he meant something attached to the engine.

He said it was mounted behind the water pump, and there's still some sort of gear mechanism still there. He'll try and get a picture to me of what's left. I told him it was probably something jerry-rigged by a former owner.
I'll post the photo of what he sends to me.

Very small compressors for tire inflation driven by a gear towards the front of the engine which were manually engaged by moving the gears into mesh was something sometimes seen on 20s and earlier cars, I have a photo of one such installation somewhere and if I can find it I'll add it to this later. But I believe your suggestion that on the 34 in question it was some prior owner modification is correct. Was Bob Jacko the person inquiring?

Also, just as a bit of trivia, some VERY early cars, before the advent of fuel pumps or even vacuum tanks, had a small engine-driven air pump (almost always camshaft driven) which was used to pressurize the fuel tank for fuel delivery. Such cars are kind of easy to spot because (1) the have an air-tight gas tank closure and (2) have a hand air pump (a bit like a tire pump) mounted to the dashboard to pressurize the gas tank when there is insufficient fuel in the carburetor to start the car.

I wonder if this is what' he's looking for?
And, what is it?

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Wow, pretty hard to think that someone could mistake a heat exchanger for an air compressor!! With 4 connections, coolant in and coolant out, and oil in and oil out, it would seem pretty obvious that it's not a motor-driven compressor though 1934 was the only year it was mounted to the water jacket plate - subsequent years it was of a very different style and mounting, and the oil filter was different (L-8 instead of L-6) and also mounted differently.

Pretty-looking engine but it has some details wrong, like the natural finish (unpainted) cap screws on the oil cooler and water jacket plate, and the green water pump (should be black).

Are they hard to come by? Without his photo (yet), I don't know if he needs the whole thing, or just the part that bolts to the back. Where does the line goe that runs under the fuel pump?

The two large oil lines (in and out of the filter) run back to the oil pressure relief valve which is mounted external to the engine. It also contains a 2nd relief valve should the oil filter clog. The usual problem with the 34 oil coolers is that the core (which resembles a heater core) fails upon old age to continue to take the pressure of the oil (relief valve should be set to never exceed 55 psi) and thus the oil leaks under pressure into the coolant. If reworking it, you need to keep the oil loop intact as it's a full-flow system, blocking off the filter can result in zero oil to the engine, so what folks do is just make a little internal shunt pipe (more elaborate ones with cooling fins) to fit inside the cooler housing. I have a picture of one such item, courtesy of Bill Robbins. Before installation he turned a series of fins into the surface to provide some cooling of the oil though with today's multi-vis oils it's really not essential.

The Eight and Super Eight coolers were the same, and yes - parts for them are not easy to come by and he may have to make a replacement for the rear stamped steel cover as many simply rusted out. However, as it's a non-pressure cooling system rustout can be easily repaired with solder or even JB Weld or equivalent.

The filter/oil cooler and pressure relief valve are all shown in this excerpt from the 1934 Service Letters.

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Thank you, Dave.