Blazer 2600 Fogs

[AIRSHO]

I am looking at getting a new set of fog lights and have a few questions. Do I need to do any major modifications to make the Blazers fit/bolt on? What is the actual wattage of these lights? Thank you.

 

[oh_SHO]

I have set in front of me too. They are 55 watts. I was wondering if the stock wiring could be used? Or would I have to use the stock wiring to a relay or something... I don't want to add another switch to the dash.