Here are a couple of Edna May WILSON folk in the area you nominated:
Name: Edna May Wilson
Electoral Year: 1954
address: 109 Linacre Rd. Also there was Alfred Clive Wilson
at 165 Linacre Rd were Myrtle Amelia and Norman Ralph WILSON, a storeman
Unfortunately there are about 12 Edna May WILSONs in Vic
You would need to provide a few more clues - eg occupations, or middle names ( maybe of the children) and maybe when your grandparents were married.
The other issue is these ERs are done in alphabetical order...so short of wading through the entire Roll looking for the matching address, its almost impossible to find the boarder without a name