54-55 Distributor caps versus 56

[okccadman]

I am trying to get new wires and a distributor for my 54 Series 62 Sedan (previous owner reemoved them as a "security" measure to prevent theft).  All local stores have them for 56 but not for 55 and back.  I know the engines are basically the same.  What is the difference?  Can a 56 cap be made to fit an earlier distributor?

[Otto Skorzeny]

I assume you need just the cap.

I don't know the difference if any, but why not just take one from one of your '56s and see if it fits on the '54.

[PHIL WHYTE CLC 14192]

The 55 back caps do not have the window in them for adjusting the dwell angle with the engine running. I have never tried to fit the later cap on my 54 so I couldn't tell you if they are interchangeable. The early cap is quite easily purchased from specialist dealers [eg. Kanter], but I bought mine from regular independent parts stores in the USA when I have travelled there.
Good luck,
Phil 

[Pat]

All the ignition parts are available from NAPA
Cheers,Pat

[J. Gomez]

I am trying to get new wires and a distributor for my 54 Series 62 Sedan (previous owner reemoved them as a "security" measure to prevent theft).  All local stores have them for 56 but not for 55 and back.  I know the engines are basically the same.  What is the difference?  Can a 56 cap be made to fit an earlier distributor?

AIRTEX part # 5D1063 shows to be available for the following years..! Same for STANDARD MOTOR PRODUCTS Part # DR427

CADILLAC DEVILLE (1953 - 1955)
CADILLAC ELDORADO (1953 - 1955)
CADILLAC SERIES 60 FLEETWOOD (1951 - 1955)
CADILLAC SERIES 61 1951
CADILLAC SERIES 62 (1952 - 1955)
CADILLAC SERIES 75 FLEETWOOD (1951 - 1955)

Rockauto.com

[Roger Zimmermann]

I am trying to get new wires and a distributor for my 54 Series 62 Sedan (previous owner reemoved them as a "security" measure to prevent theft).  All local stores have them for 56 but not for 55 and back.  I know the engines are basically the same.  What is the difference?  Can a 56 cap be made to fit an earlier distributor?

The wires are identical, but I believe the distributor cap is larger for 1956. Anyway, the rotor is different too.