If everything is correct your car will start instantly, in good condition and properly set up A7's are generally very easy starting cars irrespective of the carb. If the problem is carburation I would suggest low fuel level, wrong needle meaning the jet is set too high to compensate and starting mixture will then be weak, or the enriching device (choke) is not working.
low compressions, worn valve seats, ignition faults will all cause problems

Location: NZ