Thanks Dan. Good idea. I am a bit surprised at the direction of the responses. I was hoping someone knew where I could get a Nexus 3 speed with 36 holes. I don't know why 32 hole would be available, but not 36.
The response here have been good and I think your responses are convincing me that since I am putting this on an old '70's frame, that I will indeed stick to the old S-A AW with 40 spokes that I already have.