a little question more before the chocolates... You said the underneath of the canadian pontiac is all chevy. Do you mean that the floor pans and the trunk panels are the same? I find a website "luttys chevy warehouse" with all the panels and maybe the body brackets. Can you take a look on the attached pictures and tell me if these brackets (I told you earlier " in green " ) are there?
What it's showed in your picture is the body mount that bolt on the frame bracket. You need both to hold the body with the frame. They often look alike. If you look closely of my thread you will see some frame bracket in the frame resto section, and later you will see body mount fabrication.
Fitz.
You forgot to talk about the chocolate box....
Body mount (body bracket) is welded under the floor of the body shell Frame body bracket (frame body mount) is welded or riveted on the frame
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www.FitzbackGarage.com Look for Easy Steering in your vintage Poncho, Look for the EasyDrive Power Steering System in the web site