OP wrote (in part)... "but has a 1967 12 bolt rearend 3.07 ratio,mono leaf springs with some kind of trac bar that's rear facing and sits about 1/2 inch off the leaf spring,"
IIRC, 67 Camaros with single leaf springs (usually 327/4sp cars) had a major issue with wheel hop, and when they were taken back in a 'kind of traction bar' was installed to help alleviate the wheel hop issue.. I remember seeing one on a '67 Camaro owner in 67 or 68, but I don't recall any specifics.. just that he had wheel hop issues and GM 'installed' one...
Is that what is on this car??
Also, the 'C' prefix would seem to imply 1970 model rears (or very late '69's).. Is it a possibility that the wheel hop issues destroyed the original rear and a GM replacement was installed during late '69 or '70 MY??