I would bet the oil is dripping from the vent hose that leads from the VCV to under the dash. You should find the end of the line somewhere around the steering wheel mount. Most likely culprits of leaking oil are the shut off valve or the vacuum pump. You should hook a mity vac to the shut off valve and see if it holds pressure or sucks in oil. Also you should unhook the booster line (the vacuum line going to the pump to the power brake booster) examine it for oil, and then see what type of vacuum you are getting with the engine running. You should be getting around 23-25” hg. Low pressure to the booster can make your brake peddle feel hard.

Good Luck.

BTW – I recommend clean up the oil mess how ever you can.

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1983 123.133 California
- GreaseCar Veg System