Go here & download these Libs.
http://www.commodore-amiga-retro.com...ed/a_68060.zip
These files are the contents of a supplied Driver Disk with either the 1240 or 1260 card. There is an Installer called ApolloInstall5.0 iirc. Run it without processor card in A1200.
Nice .pdf manual here too.
http://www.commodore-amiga-retro.com...df/a_68060.pdf
Turn off A1200, re-install 1240 card & you should be good to go.
It's very important to make sure you have the correct Libraries installed when using any 68xxx processor over 68030.
Enjoy.
I believe this link from Installers Heaven should be ok as well, but it's a .dms file.
http://www.l8r.net/install/accel/apollo060.DMS
& good luck cleaning her up (battery is a coin & shouldn't have leaked) & forget finding that regulator board. You only need it for an 060 CPU upgrade.
Put the Libs on first & & see if she is stable.