before you attempt a carb rework, I suggest correction in vacuum lines which i can see from posted pictures as plugged with small bolts. check the vacuum tubing lay out pasted on battery side of bonnet base. It indicates brown / yellow / green vacuum pods connected over intake manifold, carburetor & ignition distributor.
Also the tappet setting over this 2E 12 valve engine is 0.20 mm flat for all 12 valves. The tappet is adjusted with cam LOBE UPWARD at 12 O'clock position.
the very same engine is in 1987-1991 Toyota EE-90. The manual variant fuel average is approx 13 km / liter with AC in city & auto version is 9 km/ liter in city.
name of workshop i recommend is Jamil autos @ shahrae quaideen PTCL phone: 021 34761699 10.30 am to 6.30 pm .. diagnostic charges apply