Need help on 340 motor mounts

I have the same problem in my 73 duster which has a 68 Barracuda K frame. I ended up leaving the rubber mount loose because it's off set til the motor was in and then tighten. Then wrapped a chain threw the motor mount and around the k frame. It's a go car not a show car.
I'm converting to a 360 block now and I'm curious as I'm hearing something about the drivers side being a little different? I'll be following this thread closely as again I've this same exact problem.View attachment 20140701_180404.jpg