David, welcome to Frustration 101. Murphy's Law 102 is a pre-requisite. The lines on the pump end are so close together you'll find that the one that leaks is always the one you can't get a wrench on. When you get it to stop leaking, the one you had to disconnect to get to it will leak. Eventually you will find that if you hold your mouth right, stand on one leg, and hum the proper zen chant, they'll all work without leaks. If it gets really bad, go to Frustration 102- Sacrificing a Chicken. The cylinder side connections are easier.
Cees is right. As you tighten them, it helps to wiggle them a bit, and I pull up on the lines slightly while tightening. Make sure that the flange and seat are both absolutely clean and smooth. If the connector is not seated perfectly, greater tightening will not help. The proper torque is tight enough to not leak and not so tight that you break them.
Ray
'68 280SL 4-spd Coupe