I can't post any pictures yet, I don't know how to do so. I do have a digital camera, but I don't know how to do the rest. Perhaps I'll take some pictures and try to find someone to help.
Currently. my '57 has a bad 235 (with head removed) still mounted in it.
If I can find the 'deck' height for the 235, I can set a 292 head (with my intake) on the 235, and get some measurements with childs modeling clay.