Youre on the right track. Although not sure if your rear deck has holes for components. If not just throw a coax in there. Dls424 probably would work well w your morels. Also consider rainbow sl100 or infinity 42.9i
Ask technic about spacers. He may be able to score you some.
Also technic will sell you connectors with purchase of a harness
WTB - Used - 1x Blizzak LM-60 225/45/17