1987 4.3 omc cobra quadra jet, rebuilt engine 50 hrs on it. Bogging at 3500 rpm, new points, cap and rotor, dwell at 38, timing at 6 deg, 18deg at 2500 rpm.. Electric fuel pump 4psi 35 gal per hour. Engine bogs right out and will die at 3500 rpm soon as second aries start to open. Carb was...