please help...if it's not one thing it's another....

Is it out of gas? I have had quite a few A bodies over the years that ran out at 1/4 or 1/8 tank showing on the gauge...... Like was already suggested - take off the air cleaner, hold the choke open and have someone pump the gas pedal - you should see gas squirt out of the accelerator pump nozzle in the carb. Next check - without any gas or anything flammable around, pull the center wire off the distributor cap and hold it 1/8" or so from a good ground. Use good, insulated pliers, and have someone crank the car over with the key. You should have a nice crisp, hot spark jumping the gap.