Oh no!!!
I hate the thought of having an oil line installed in the rear oil gallery.
You won't know you have a leak until it may be too late, then, you get to pull the engine to look and see what is up.
Or you may you may find out when your clutch slips & burns to a crisp.
Either way, it's tow truck & pull the powerplant assy time.
How can it be made more permanent, sweat a copper line to a copper fitting???
I'd have to at least braze a bead on to lock it, but would that melt the teflon tape? or paste?
Use all steel pieces, then braze?
What if harmonics get it to crack open?
I sure think you should grommet the block where the line goes through.
Where is that line going, anyway? I missed something in the text?
DANGEROUS, otherwise, I would consider doing this...

Seems like a good idea, at first blush.
I think I like the idea of putting carb jets in the lifter feeds, then doing the normal bypass line.