Headlight Keep Burning out. Help

[72MARIO]

Well I nearly got stranded last night 1 1/2 hours from home with out headlights. The night before the drivers blew out I just did not worry about it. I kinda noticed that there were no lights ahead of me so I said to my girlfriend I dont think my lights are working. She says why dont you pull over and check ?. I knew I better figure out whats wrong. So I pulled over and about 1 minute later a guy who had seen me at a show earlier pulled over just to see what happned. He owns a purple 50's pannel on AIR laying body. It's been featured in Street Trucks it's perfect. Anyways we went to Walmart and they sold everything but round lights. We ended up going back to his shop and he had the old lights from the pannel and one from a hot rod they are building they bolted right in.

On the way home the pass side bulb pops. Any ideas why ? I have a original headlight switch and a new cheep high low beam switch. Could either of these parts be a problem ? All the wiring is setup right.

Thanks for any help.