Re: Stewart's 1955 Packard 400

Posted by HH56 On 2024/3/17 17:37:30

With the Olds pump you will not have the aux pump in the crankcase so all the tubing on the side of the block between exhaust manifold and oil pan may be missing. Since you didn't mention the balance valve, that has probably been eliminated too. Your wiper motor and washer vacuum supply will start at the tee fitting at the back of the carb. The other port on the tee will be for the power brakes so you will need to leave that entire setup intact.

The revised tube routing depends on whether you have any kind of aux vacuum source such as a dual action fuel pump etc, If nothing, the short bent length of tubing from the back of the carb to firewall is all you have to run the wipers and washer. If you have an electric wiper conversion then you just need the rubber hose from the short end of the open metal tube to the washer but if you still have the vacuum wipers you will need a tee in the rubber hose so one line will feed the washer and the other feeds the wiper motor.

If you add an aux vacuum supply such as a dual action fuel pump then you could either keep it sort of stock looking by using the old crankcase tubing to the balance valve and connect that to the pump inlet or do it the pre 55 way by running extra metal tubing from the carb tee to place the vacuum section of the pump in series with the metal line to the firewall. It would be carb tee to pump outlet and pump inlet to wiper motor and washer. That method would no longer use the balance valve and would just need a tee for the wiper motor and washer.