I have an older CDA-7893 headunit, around a 2000 model and I need the dimensions for this headunit. I would look in the box but it got thrown away some time ago. I am wanting a new headunit, either the CDA-9855, 9853 or the 9851. Will either of these fit in a 95 S-10? Also, how well does the KCA-420 for the iPod work?