9006 in stock headlamps?

Just wondering how hard it would be to convert my stocks to fit 9006 bulbs?

reason:
My friend picked up 9006 hid kit from his friends written off car (he works at a junk yard) and said he would give it to me if I could get them to fit in my car…

just curious if anyone has done this, or has the step by step to do so? (is it more than taking a dremmel/exacto knife to the housing)