Looks like you have everything covered!

I've heard that
"babbit is forgiving" more then once. So when it is my turn to build a touring motor
I'll go babbit. Also, the block I'll be using is a "B" diamond and already factory
"pressurized", if that is what you want to call it.

No mods there except for the oil pump to be opened up some for a larger flow.
If I was using a stock "A" block to build up on. I would again go babbit
and have just the center main set-up with a an extra oil line, plus open up the oil pump.

Jus' what I would/will {hopefully} do........good luck!