as i said everything, that is behind pci bridge will be useless at this point im afraid, but you are free to experiment with it or add lacking support yourself if you feel like that;)
so basically a4k with a 060 and scsi sounds good. you only dont have any compatible rtg, say a zorro one. an a4k has a problem to boot aros from internal ide, some timing issue, unlikely a1200, but scsi should be fine.
do you use ide drives on scsi, via scsi-ide adapter? because the easiest is to copy aros files to a partition via uae and i dont know any method to attach there scsi hds. instead to access an uide drive sb-ide adapter should no issue.