I thought it was "may the flees of a thousand camels infest your left armpit" Or depending on the company, "your left testicle"
About the ford stuff on a Chevy, I have had good luck with many different parts from ford while converting my 48 to diesel. Although sometimes you have to turn things upside down or inside out to get them to work properly. Take my rear motor mounts for example, they are both upside down and inside out to work on my Detroit. I have also used the booster and master cylinder from a new ford diesel. And some other small things too.
When you are trying to make something work that was not designed to work like you want it you must consider all your options for parts, and sometimes that other company has just the thing that works...
Grigg