Cutting tool and die grinder would be handy in this!

You would also want to seal the area behind the 6x9, perhaps using that tray as an enclosure. You could get very good bass out of that, if you modified it to a well sealed ported enclosure with a port near the end or near the woofer.

Use your imagination in this, read up on sound dynamics, and ask around to figure out good dimensions for this project.

Yes, I have and it was not a joyous thing to do. As I recall there was very little room from the back of the magnet to the door and even less between the speaker and door panel. If I turn it up enough I can get my 5.25'* to hit the door panel, but I avoid doing that.
There will be variable to consider as well. Different speakers will have different depths, the magnet may not stick out as far. And I don't think the Infinity 6.5'* would have bolted onto my stock speaker plate.

6X9'*? Why? If your going to do any modifing to the door get 6.5" to work!

Thanks for all the help guys. I think im jus gonna go with some Pioneer Rev series 6.5s because they are supposed to have a lot of bass. They do have a "deep basket" so would I need to use some spacers or something for the magnet to clear the back of the door?

something that has not been suggested before......get a door panel off of a 92-93 with the 4x6 in the door, im sure that there wouldnt be much modification to get a 6x9 in there

One thing i want to do whenever i work on my door panels, is strengthen the door. Make a metal support bracket that goes from the speaker area, to the door metal. Like a strut bar i guess.

Are the Door speakers mounted in the plastic door panel on the 92+? On a 87-91 the speakers are mounted to a little plastic piece but its screwed into the steel. If the 92+ have the same thing, it should be exceeding easy, just cut out the sheet metal and drop it right in, it shouldnt hit the steel inside the door, but Ill have to check. Would it be worth the work to put 6x9s in the door though? Are there component 6x9s with seperate tweeters?

where the speakers are on the 92-95 are screwed into plastic. you can remove the whole piece on the 92-95 There is a plastic piece the runs down the whole door that holds the window switches and the pocket. On the 96-99 that part is molded into the door

Yes they were but I took them out because they did rattle like hell.

I thought that it was you i couldnt remember though and i know that it was in a car that had tan interior, i remember seeing the pics awhile ago