Thanks for the picture of the label 646870SS, with the part number I did a little more research and that would be the correct shroud for my 67. I was able to verify it on GMPartsWiki here:
http://www.gmpartswiki.com/getpage?pageid=21326 (starts at bottom of page).
Below is a picture of what I have now, and based on comments it is clear that I need the deeper shroud. One of the tabs is broken and I was going to repair it before putting it back in, but now I think the best thing to do is track down the OEM part.
Thanks to all for the help.