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Rear antenna retaining nuts on the 55/56 Caribbeans required a spanner to install/remove. I made one by using an old broken-off drill bit of proper diameter as the "pin", and shaped the rest from some soft aluminum stock. Took about a half hour to make, kind of a fun project.

Hi Stan, and thanks for the nice words. Your questions cover a lot of ground. Just on motor oil one could write a book, but a couple of generalities. First, any modern oil bought today will be better than what was available when your car was new. And If your engine is clean inside and has been using...

Its tyoical to have some freedom of movement of the shaft.

The vacuum unit changes the position of the points relative to the cam on the distributor drive shaft. This can be accomplished in several ways including (1) using the vacuum unit to rotate the entire distributor body and (2) with the distributor body remaining in fixed position, using the vacuum un...

What type and size are they? Picture?

Greetings Tom, and welcome. A compression test is just one of many different tests which can be used to evaluate the condition of certain aspects of an internal combustion engine. The compression test is typically used to evaluate the condition of valves and pistons and to diagnose possible head gas...

The 356 engine was never an option for a lesser model, it defined the top-of-the-line model (the Custom 8). Are you sure it's a 356 engine and not just a 356 cylinder head on a 327? You might check the motor number.

Take a look at the 1953 Owner's Manual, the optional gas filter which would be mounted just ahead of the carburetor, is pictured. There were also aftermarket types that were similar in function and appearance. If authenticity is important to you, try to find an original or an "of the era" filter, th...

I'd have to check the 1953 Packard Accessory Catalog but I believe that as late as 1953 the in-line glass bowl filter was still an accessory and not standard equipment. And the ''filter" in the pump is nothing more than a fine metal screen which can catch larger debris but not fine particles or silt.

Welcome. Obviously the number meant something to someone at some point in time, but in format and length it's unlike any Packard number I can think of, perhaps a number assigned by a vendor of an outside purchased part? But to have any hope of an answer, perhaps you can tell us what year and what mo...