AutoCAD versions R11 & R12. These were meant for 68k machines with math coprocessors. I found them at: http://www.mediafire.com/?sharekey=b88e2ce4ed1308ff91b20cc0d07ba4d2499b7.... Thanks to Euryale for the link.
Autocad R11 and r12 works on Mac OS 7.6 and 9. Does not work on Mac OS 8. To extract the files, use StuffIt Deluxe 5.5(http://macintoshgarden.org/apps/stuffit-deluxe). To make the program work, use the "Software FPU" included within the AutoCAD R10.c5 (http://www.mediafire.com/?3x37c7z1ctj56#fzb9odjzcp2fo)