Won't work. In fact in the 840AV SIMMs larger than 32MB are seen as 1/4 their rated capacity. In the 800/650/610 they are seen as half their rated capacity, so it is possible that installing 128 MB SIMMs might get you 64 MB of capacity per slot.
I did some extensive experiments a while back and posted them either here or on Applefritter. A search here doesn't turn it up, so I must have posted on Applefritter.
The 7100 and 8100 behave like the 840AV and 660AV in that they treat larger SIMMs as 1/4 capacity. The 7100 and 8100 have an extra logic chip between the memory controller and the SIMM slots, which screws up the support for larger SIMMs seen in the 6100.