I guess the problem ended up being that I didn't really have a Color
Classic. I had forgotten that I had upgraded to a Color Classic II by
replacing the system board with an LC 550 board. When I swapped the
original system board back in, the DiskTools 7.5 floppy booted up
just fine. I was then able to install System 7.5 from CD and then
overlay Update 2.0 (7.5.3) and the 7.5.5 Update downloaded from the
Apple site. I then put the LC 550 board back in and I'm up and
running with 7.5.5. Now I need to find a 32mb SIMM to upgrade the 550
board to its maximum of 36mb and a PDS ethernet card.
Thanks everyone for the assistance!
David