If you are using a resonant 1/4 wave antenna, the resistance will be about 75 ohms. The best way to match to the antenna is to tap down on the coil or use two tuning caps in series to make a voltage divider. Let's say you want 0.1 watts output and VCC is 5 volts, then the max signal at the collector is 10 volts peak to peak = 3.6 volts RMS. The resistance seen at the collector must be: E^2/P = 130 ohms. Since the antenna is about 1/2, tap down half way on the coil, or use two equal values of tuning cap with the antenna connected between them (you have to double the cap value from a single cap). I would stay away from extreme L/C ratios, but I don't think you will see much difference as long as the coil has good Q. Q = Xl/Rs