W108 W109

hello
I bought a 69 280s (second owner from new)1 year ago.It needs a full restoration so I started a mechanical restoration.The car was in storage for 5 yrs,and had not been started.I replaced all fluids and filters,had the carbs rebuilt,drained and power washed the gastank,replaced all ruber hose and lines,added new bosh platinum plugs,replaced fuel filters,overhauled the mechanical fuel pump,changed the points,ballast resistor,and ignition cables,cleaned and refitted the distributer cap and rotor,after all this the car only starts when gas is poured in the carbs and dies.I have poured fresh gas(87 octane)in the tank and some fuel stabeizer,poured a can of carb cleaner in the two zeniths, Replaced the fuel filters,