Pull off the door card and have a good look inside for clearance issues. Cut the hole to the speaker size. I imagine a 4" would fit easily, maybe even a 6". Might need some spacers depending on the magnets. While you are in there, add sound deadener and grease the window regulator.
Welcome aboard. You obviously have great taste. So you got a 87 FJ62? The one with those squishy rectangular headlights and handicap accessible window cranks? Just checking if there was a typo and using this opportunity to poke fun at the four eyed little brothers of the 60 series community.
I don't know if this will help as my camera sees the light brighter and more glaring than my eyes do.
Low beams ^
High beams
I might need to lower the adjustment a little.
It's a win! Great cut-off on dims, no excessive sign glare or weird patterns. Like stock but much brighter without being a nuisance. If you have the H4 Koito's you will like it.
This! That clogged breather is probably why you had to replace the pinion seal. I've seen it before. Run tubes up from both diffs and the transfer case and cap them with a fuel filter or something similar. Trail Taylor sells a nice kit that looks much more tidy.