I have completed my first cc upgrade. I used a 575 mb and replaced the 680LC40 with a straight 68040; upgraded the video ram to 1 Mb; put a 2 Gb scsi drive in; installed OS 8; and got on the internet. I have a 32mb RAM stick in now and am going to try a 128 this week. But I'm also a wimp:
Couldn't bring myself to hack the cc analoge board figuring if I goofed it up I'd be dead ... so I took off the resister at 116 on the lc 575 board and did the jump at R109. Worked great! (you can get 512x36?) which is some benefit.
Now if I can get it networked
Thanks to everyone for all their work and getting the info on the web.