Walt,
I could not locate the drawing that I mentioned, but there is a general drawing of a loaded LST in the Squadron US Landing Craft in Action book (you can do a google seach of LCT, LST and find it). I spent a LOT of time looking through LCT and LST photos on Navsource. I won't post the links, but just go to the Navsource Amphib page and you should be able to find them. These were the best that I was able to locate:
LCT 539-2 photos showing bracing and chains securing the LCT.
LCT 773-launching-showing cradle
LCT 314-2 or 3 good photos showing the loading of a Mk. 5 on an LST
LCT 689-launching photo showing the skids
LCT 1190-launching from LST 78
LCT -182- timbers and restraints
LST 882-overhead view of the cribbing layout on an underway LST
I also have some photos saved from one of the LST pages that shows the cribbing on deck after the LCT has been launched. I can forward those to you if you need them.
One of the best photos that I found was on the Navy History and Heritage Command web page, photo SC 188372:
https://www.history.navy.mil/content/history/nhhc/search.html?q=sc+188372Good luck with your project!
Dave