When i used to use english cars half a lifetime ago, if you overfilled
the crankcase the oil would leak throught the rear crankcase seal into
the clutch.

Just be prepared for a big cloud of oil smoke every time the oil
surges and hits the crank.  It will be flung up the bores in such big
quantities that the oil control rings will be swamped and let lots by.
Just drive in nice straight lines, avoid rapid acceleration, heavy
braking and slow down to a crawl for curves.  If you get a big enough
surge it will slow the crank quite quickly, to avoid taking a bite out
of the steering wheel wear a seat belt.  Oil surge has been known to
twist the crankshaft when one end slows a lot more than the other but
that's probably long inline 6 cylinder cranks.

If you are really unlucky it will be flung up the crankcase breather
so fast it gets sucked into the cylinder though the PCV valve and then
hydraulically lock the engine = broken rod, holed crankcase.  The
breather does have a baffle plate over it but under high volume fling
it may act like a scoop.   I've seen a gearbox "pump" 1/2 it's
contents out under acceleration when the oil hit the gears and they
flung it straight though the breather system.  But it was doing a 8
second 1/4.

I can do the smoke screen trick on just 1/2 pint above the top mark in
summer on dry roads.