> the plastic firewall connector

I'd get rid of that (or at least keep a close eye on it). Replace it with an
appropriate brass fitting, or just run a continuous fuel line from the
plastic pipe to the tee by the oil breather. I bought a couple meters of
gray plastic hose protector, put an extra-long piece over that hose, and
just went underneath where that plastic fitting usually sits, cable-tied
into place.

--
John Bange
'90 Vanagon - "Geldsauger"