Upgraded the stereo in 3 phases: sharing what I have learned and completed.

[Mike24Ineos]

@Clark Kent where did you mount the cross over boxes?

I mounted mine on the backside of the door cards near the speaker opening with hot melt glue

 

[Clark Kent]

I mounted mine on the backside of the door cards near the speaker opening with hot melt glue

An excellent choice. I would have done the same if I was mounting the tweeters in the doors. That would simplify the wiring.

 

[Mike24Ineos]

I thought about A pillar installation for the tweeters but the convertible design of the Kickers allowed me to aim the tweeters towards the seating position running as a coaxial. Saved a lot of stress on me mentally