[Vwdiesel] PS belt

[Pam & Doug Boes]

What is the correct circumference (length) of the belt that drives the power
steering pump on an 81' rabbit diesel pickup? I have a Gates belt on it now
that is

10 mm X 624 mm and the adjustment is out all the way. I tried a Gates that
is 10 mm X 614 mm and could not get it on with the adjustment all the way
in. I want to switch to a Continental belt. Is 617 mm the correct length?