Thanks gentlemen for your help.
The drumhead on this car is easily removed it turns out. I pulled a dental pick from my toolset and gently pushed on the tabs where the portion of the railing snaps into the floor. The railing cam out easily.
The drumhead has a small hole in the backside. Inserting the pick into that hole caused the cover to pop off with hardly any pressure.
I connected the bulb directly to my old ZW and slowly added voltage. The bulb did not light.
Now I wait for the 1.5V grain of wheat bulbs on order to arrive.