Good luck, hope it works

And, i have just tried installing 8.6, and it broke floppy support, so make sure you have 8.5 or 8.1 to hand

And as promised markyb86, pics of the floppy connector on the board:



and something odd happend while testing today, seems the imac still has the old style icon for when it can't find a boot disc in it's firmware:



No idea how i got it to do that though....