LISTEN TO ME!!!
Weld that **** directly to the frame, in as many spots as you can to make sure that cage doesn't move. Your just extending the frame to a chassis, making it sturdier, & more protection. SOLID!
Links are cool if you ever want to remove it, but otherwise, it's allowing flex.
Let the suspension flex, & the vibration mounts where they need to be. But the harder core you go, the more solid it should be.
Tube enough to protect your rig, passenger, & tie it all together.
[YT]http://www.youtube.com/watch?feature=endscreen&v=uACVL1aKK6k&NR=1[/YT]
[YT]http://www.youtube.com/watch?v=dbn7Q2u3vAo[/YT]