The generators were smaller in diameter then the alternators, and hence the fuel pumps were taller (why? Because they could be!). When VW went to the alternator a shorter pump to clear the larger diameter alternator was in order. After a year or two (I think), they introduced the angled pump and shorter push rod. The Bakelite base also changed. Enough history, it just serves to confuse. I am pretty sure you have an angled fuel pump. Just asked for a later year (74 maybe) pump and match it up. It should be just fine. When re-installing make sure you either take a picture, write it down, or some how memorialize which is the "in" hose connection and which is the "out" connection from the pump. Trust me...you will forget and then get angry. Also don't tighten the bolts down to much. Those bakelite bases can get a little brittle with time. Forgot to look where you are but any Autozone or Parts America will carry them, and usually in stock.