can the indicator lights yellow bulbs be swapped for clear ones

[Serpa69]

Depending on what state you live in you need to have a amber turn signal on the front of the car. That is why you see people put two sets of lights in the housings on 69 camaros. Are you trying to use them for driving lights?
What state are you In?? If you are in California You can have white or yellow turn signals here is the code in that country 24953 VC. As far a can they be swapped out you can give them a call (916) 373-9783