Bill,
You are right about having to address the socket issue. I would have to replace the socket fiber disc (single contact) with a disc with the double contact, and use a drill and a dremmel tool to move the slot in the socket to match the 1157 bulb. Now I have to decide whether all of this is worth 3 candle power (32 cp + 3 cp of the 1157 versus 32 cp for the 1156). Is there a higher cp dual element bulb that is the same design as the 1157. I hate mice.
Carl
