Need help fitting Double DIN, 84 GSL-SE
 

I just got a Double DIN CD/DVD player from work for $50 and want to install it in my 84 SE, does anybody know of an install kit for a double DIN, or do I need to modify a single DIN kit?

This has been answered previously here. If you google search for "Mazda multi kit" there are many online stores that sell them. They'll just need some slight modification.