I installed a powerview (a scsi video card) into the chassis of a classic II and with a long enough cable it works just fine. It is being powered off of the analog board and I then sideways mounted a scsi2sd .
When I first read the heading, I was hoping that you were going to say that you came up with an idea that the rest of us with Classic IIs could create / duplicate.
Fooled again!
Oh well. I need to finish working on the voltage issues with my Classic II first.....