For your year and model front turn signal and parking light bulbs should both have the Ba15s mount. The socket should have one contact at the bottom and ground through the base. The slots for the locator pins should be the same depth and are opposite one another.

The original spec for the parking light bulb is 67. This is the upper bulb and it is a single element 5 watt bulb.

The turn signal, lower, bulb was originally a 1073 which I think is still available. It is also single element but 21 watts and the globe is larger. The 1156 bulb is identical except it is a little higher wattage. It will work for this application. I'd use the original if you can find it.

In some later model year, I think 1986, the front turn signal bulb changed and the 1157A was used thereafter. It is a dual element bulb and the mount and contacts are different. One locator will be at a lesser depth than the other. Also it has an amber globe due to the clear front lens. This bulb will not work in the Ba15s mount.