High-Sly

I have no experience searching for vdrives

Sorry

What's on my boat and other Cal 40's I've seen is a Walter RV-10. I was told by someone that this is too small for my 3GM30 so I called Walter (years ago) and IIRC they said it was fine. I believe they said it was the only one they had that would work because it was the only one with a 1:1 ratio. Yanmar's transmissions only came with reduction gears. Apparently the preferred method is a 1:1 transmission with the reduction in the v-drive.

Walter doesn't have much info on their web page, you have to call them. Very helpful, but kind of picky about how things are done.