I have a '70 NMW catalog and the Chevelle, Nova and Camaro tabs are all different. In fact, the '69 Camaro is different from the '67 & '68. I can scan and post a pic from the catalog of the '69 Camaro tabs if you'd like (tomorrow).
I was on a budget, so I made my own back then (along with the tow bar). They always got me there and back just fine.
Verne