Gen 3 camaro rear sway bar frame spacer

[mrlobster]

I've read many threads about installing a Gen 3 camaro rear swaybar on my '72. I understand that a spacer is needed between frame and end link bracket. Is there a consensus as too how thick that spacer should be? I've read 1", 1 1/8", no spacer...
It will be a 7/8 bar, mounted above the axle, facing rearward, if that helps.

Thanks!