assuming the cd changer is a MINI unit then yes it can if the head unit is replaced with a MINI unit of the same age. There might be some conflicts with later cd hu's but a good search in here will confirm everything.
If the tape is a WAVE tape unit then you will need a wave to boost harness adaptor & wave to boost cd prep adaptor
Both here - NewMINIStuff.com
If your tape is a wave then no adaptors needed
If your not sure if it is wave or boost tape then check the faq at NewMINIStuff.com