[Mr70]

It's definitely a 1970 + open element top only,and not the larger diameter Dual top.

1970 L-78 Elcaminos could not get the dual snorkle.Dual snorkles came out much later on in the 70 model year,long after the L-78 option was cancelled for Chevelle/Elco which were only produced for the first 90 or so days of production,before the LS-6 came out.