You don't say specifically what model or year so I am going to take a stab at this. Going to assume you have a 2.25 diesel unless you have the safari wagon which was the only one with a 2.6 in the Model 2A. Still convinced it's a 2.6 look and see if it has a Westlake cylinder head. This is a very cool vehicle (nice find) <img src="/forums/images/graemlins/cheers.gif" alt="" /> Only 88's (109) Safari Wagons were available (export) from 1968 to 1974.
The 2.25 shows a primary and a secondary fuel filter. I will need to resource some material on that Kiki Bosch pump - if I find something I will report back

Good Luck

John K