I think we’re saying the same thing?
You have your end grain slab laid on a table in front of you. From left to right divide cut it into parallel pieces (width of these is up to you 2" or 3" is probably fine). With them all laid on the table on their original pattern, rotate or flip alternating slices. Glue it up.
The simple answer is yes.
It’s possible to encode or tunnel anything over any protocol.
The next question is why isn’t it done more?
For the above reasons it’s actually more common to see other protocols run on top of http. This is especially common to prevent blocking and censorship by making the traffic look like normal http traffic when it may actually be private messaging apps, file transfers, VPN, etc.