No, there are some sort of metal plates attached to the frame, on which wood blocks are placed (with a heavy reinforced rubber pad on top or bottom of the block). The suburban panel-body mounts on those (four or six) blocks/pads (towards the rear of the body).
- I do not know if Panel and Canopy-Express bodies mount in a similar fashion.
- I do not know if those wood-blocks are only on 1954/55 Suburbans.
I will not be near my Suburban until late February. I'd be pleased to post photos if someone sends me a PM reminder.
https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/245454/body_mounts.html#Post245454