Anyone ever tried a Lock Right diff in a D 60?

You are basically turning your open differential into a Detroit Locker. It is the exact same internals. The Detroit Locker is a pretty violent setup. It was designed for balls out performance in a straight line behind high horse power. They are not for the meek. If you cannot stand the locking and unlocking action, I would look at another option.

I ran one on the street in a pro street Monza with a blown small block in the early 80s with a Muncie 4 speed. That carrier was so loud, my coworkers could hear it when I pulled out of the parking lot. It shook the whole car when it disengaged.

All that said, if you want something that's totally badass and will not fail in almost any circumstance and you do not mind the noise, then go for it.