need at least a 68030/40 processor and a 4 way eide, like the "eide express" a scan doubler flicker fixer then 3.1 roms and os3.9. but then i'd sure try to get a 68060/50 processor, then you'll need to build a better power supply or buy a tower...OR just wait a while longer and get that mini A1 board and os4 and save a bunch and have a brand new better faster system. these classics drain dry many a pocket or bank accounts. check out elbox.com to get an ideal if you really must stay in the classic range.. good luck.
