My first thought is: Don't open a hub on the west coast if you plan to fly to all the same airports from your bases. The aircraft are simply not fast enough. I would suggest you to open a mid-western or a east-coast base next, also because the concentration of airports is bigger in eastern USA.
I don't know much about 1950's aircraft, but I would suggest you to use aircraft search ('Aircraft' -> 'Aircraft Search'). The faster, the better. Try to aim for ~50 seats, considering the size of your bases.
If you aim for a top ranking, there is one golden rule: Never fly more than 1x frequency.