Hello! Another question for you all - thanks so much for all of your
help so far :) Vehicle in question is an '83 2.0 liter aircooled CA.

I need to pick up a hose today, but forgot to bring the old one to
work with me for comparison... there's a tube going from a rubber T at
the plenum up to the deceleration valve - this tube is held to the
valve with a short length of rubber hose. It's that short length of
hose that I need to pick up - the current one is brittle and cracked.
Can anyone tell me the inner diameter of that hose?

Thank you kindly!
Mike.