Yes David, only in 67, and only the 400's the H.O. 326's and the Sprint 6's got dual traction bars while the 3/4 speed counterparts (326 and OHC-6) got the single and the AT's in standard 326/OHC-6 got none...

I've heard speculation on the first few 68's possibly having the 67 mono leaf suspension, But have never heard of any documented cases, so I would doubt it.

And Scott, yes, the stock traction bars are inboard of the rear mono leaf springs and look like an "I" beam type of bar, and mout to the rear end tube, welded to it! Not bolted to the rear spring itself. But you might just hang onto the lake wood style ones you have?

Good luck David! - Brett - 67 Drop Top 455!