Looks to me as though your fuel tank will be too low for the carby, that said a 2oz tank is not micro on a .33ci diesel ----------------- its HUGE. Just make up a tin tank similar to that used on control line models, a diesel will run for some time on the fuel in the line and wiil need to fly some distance inverted to kill the motor, normal stunts/manouvers shouldnt worry it. My 1cc Barbini runs 90seconds on 3mls(cc) of fuel so a 20ml tank should give you at least 10min run times probably closer to 15mins.
Stewart