Dual Vacuum Distributor Hoses

A very common question regarding the dual-vacuum distributors is - which vacuum hose goes where? Following is a quick run-down -

  • First, take a look at the vacuum can on your distributor. On the flat side of the can is a hose fitting. This is the fitting for the RETARD side.
  • Second, on the rounded side of the vacuum can you will find another hose fitting -- this fitting is for ADVANCE side.
  • Third, look at your 34PICT carburetor. The fitting on the LEFT side of the carburetor is for the ADVANCE side of the vacuum can on the distributor. With a rubber hose, connect the fitting left side of the carburetor with the fitting on the rounded side of the vacuum can on the distributor.
  • Fourth, look at the carburetor again. On the rear (rear is rear) of the carburetor you will find a fitting up towards (but not on) the carburetor top. This is for the RETARD side of the vacuum can (on the flat side). With a rubber hose, connect the fitting on the rear of the carburetor with the fitting on the flat side of the vacuum can on the distributor.

If you have the new replacement H30/31PICT carburetors, the procedure above is the same as they come with the same vacuum fittings as their distant 34PICT cousins. The original 30PICT series carburetors did not have the retard fitting.

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