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Vacuum pump helped with the wipers , as they are vacuum operated . Going up hills or under a load , little vacuum . Thus the need for a pump .
On my Pontiac I should say ...
Last edited by JWC 3; Jul 11, 2015 at 10:10 PM.
Reason: clarification
Look at the picture you posted in post #7, the fuel line goes from the pump to a filter and from the filter up the engine to the front where it goes around the valve cover.. The area where you are pointing in the other picture is where the filter mounted..
The 262 was an industrial and heavy engine also . The fuel pump mounts at the front cover . My guess on the rear plug is a vacuum pump , or some other extra pump . Post # 7 clearly shows the fuel pump at the front cover area .
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