I did replace both the cassette & the CD player.

On the upper slot i place in a kenwood cassette player w/remote & on the lower slot i place an digital EQ full DIN 10 bands,looks very,very cool.
I also runned a full speakers wiring without touching the factory,the harness were left intact by just using a metra adaptor.Two 12" subwoofer (600watts each) & four 300watts three-way speakers each one was the complement along with an 6 CD changer unit,a 3.00 farads cap & two 550 watts four channel amps ALL ARE KENWOOD BRAND0

Years pass along when last i did this sort of job,usually for friends & folks.

I was kind of lazzy when i started,because it takes a lot of time doing all this,specially the wiring.but i split the job by doing a bit every weekend