I'm using an MC68060RC50 rev6 mask 71E41J, the newer one that doesn't even need a heatsink to run stable at 50MHz.
Keep in mind that there's unneeded wait-states added to the fast RAM access because of the A3640 logics, but in the future I want to try to fix that with SpeedGeek's amazing work.
Too bad about the 16MB RAM limit on the A4000D motherboard!
EDIT: I use phase5's latest 68060 library from 2001. The system runs incredibly slow if you don't install a 68060 library and a 68040.library dummy/redirect!
Here's a sysinfo pic:
2.05 times faster than an A4000D with a normal A3640.

And probably more mips if I hack the A3640 state machine logic!
Ok I got it booting now. I just forgot to make sure the colored pins in the picture didn't touch eachother.
Hello
What type of 060 EC LC FULL are you using and can you send some Speed tests. Also to Fitzsteve guess what im going to try this on when my package Comes Lol. Still got the Sonnet.

)
thanxs Laurence