No jumper needed. its right at 8MB. I just turned off the last MB, so it stays at 8MB instead of 9MB. So basically we are wasting half of the last chip. doing nothing. 

I could remap it in the expansion ROM area, but then we would need a special driver to tell the Mac OS to use it as RAM. 

The last thing I need to do is toss it in a Backlit model and see if it works. In theory, it should be universal. I actually did NOT need the DTACK connection on the non-backlit. So, we will see on the Backlit whether I need it or not.