Welcome to the Forum Dan! Now here's a little info to get you started....
Before you drop the pan to work on the oil pump, look at this:
http://www.1956packardpanther.com/PV8C_OHVOPA.html There's a lot of things that all of us in The Packard V8 Club have done in the past year alone, and more to come.
One word on the Bendix Treadle-Vac, GET RID OF IT!!! It's an accident waiting to happen, no matter how many times it's rebuilt. Just ask Craig H. on here about it, he'll relate his story about three failures of the same unit.
As for your "auto park" not working, I assume you have the Pushbutton Ultramatic? If so, check your wiring under the dash where the connector from the pushbuttons is located, and push each wire back in, I've noticed mine has on occasion vibrated out and lost connection. I solved this by expanding the tab inside the female connector. If that's not it, send me an e-mail, and I can help you get it working again. (I've got LOTS of experience with the pushbutton, and have been successful, thanks to Mr. Pushbutton on here)
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