Too true. No 32-bit addressing, for starters, so forget Mode32. CFM-68K crashes it. Retrofitting of AppearanceCDEV and its Extension gives irremediable address errors. And on, and on. A couple of wasted days in outcome, but a fair degree of learning in my recent/current resuscitation of a rather nice 4MB (80ns, to match the RAM on expansion card and MLB) Classic 'Rev. B' whose only fault is an apparent need for resoldering of the video-in card's connections to the CRT. After several hours of use, or in a Summer ambience, the 3:1 chequers appear at restart, and all further startup activity ceases. No chime. No nuttin'.
But there is one happy note: it will run TattleTech 2.59, which is useful if not as complete as 2.84 on later Macs.
de