I got 6x9s in without spacers, just removed the spot welds from the pods under the shelf I can provide pic if needed
Sorry for the late reply here is how I have them mounted All I did is removed the shelf and knocked out the 6inch speaker pods with a chisel by giving it a wack on the spot welds, I then marked where I wanted the speaker to sit so that the magnets wouldn't touch anything that's while there on an angle once all the markings were in line I cut the hole with a hobby knife. And to screw them down I used screws with nuts on the other side. They look better then spacers and give a better sound as a friend has the same speakers with spacers and same head unit, the bass on mine is more solid. Sorry I don't have step by step pics but may do one when I help a friend with his.