It would be easier, if you would provide the combination of chips that you currently have. In the perfect world, replace buster for 11 (full zorro 3 compatibility) and DMAC04 + Ramsey07. And you need 3.1 or 3.2 v of a3640.
If you want to install any 68060 cpu card - you must upgrade kickstart for 3.1+.
Good idea is to upgrade SCSI chip and replace GALs.