On my 84 110 (RHD, petrol) I found a fuel pump on the right side frame just behind the front seat with a generic see thru type filter. Is this original? I cannot find in manuals and usually in fuel tank. It got my attention because of a clicking noise. Should I replace with a similar pump (great location for servicing) if so, any recommendations? Not sure of the condition of the one in the tank and if wires work, etc. Thanks.