John,

Yes, I am mounting the sub box under the rear shelf with "L" brackets. Its not going to be ported to the passenger compartment -- there's no port tube. Instead the speakers will fire directly through a hole that I will cut in the rear deck, where the medical kit used to be. The hole will be about 8 x 8 or 8 x 10.

I think that MB Quart 3 ways will sound very good in your car; I wish that I could fit them in mine. But, alas, I don't have the 6" stock door speakers in my '87. Instead I have the MB Quart RKB 110 4" coaxials in my dash. They're the ones with the Musicomp crossovers and sound very good. They don't go down vey low, though. Maybe to 200 or 250 Hz.

I'd be reluctant to remove the rear speakers in either your or my car. One reason is that in my car they help with the midbass. Another reason is that, because the factory front speaker locations aren't ideal from an imaging/staging perspective, having highs and mids in the rear actually improves imaging/staging somewhat over what the system sounds like faded all the way to the front. This is probably due to the fact that the front seats get a more balanced stage from the rear (more equal path lengths due to further distance from the rears speakers)than from the fronts.

If you like, send me your e-mail address and I will keep you apprised of developments.

Dave