how do I troubleshoot a fuel problem for a 79 mgb? I replaced the fuel pump but not getting fuel out of the tank to the carb-I have 4-5 gal of fuel in the tank

Test the pump off the car to make sure it's working, you should be able to hear it ticking when you hook it up to the power and it should provide low pressure fuel flow. If it's not pumping you might want to check the points on the pump (if you have the original SU pump that is) and check the polarity (SU pumps come in positive and negative earth). Next make sure the in and out lines are hooked up to the pump correctly or you might be pumping the fuel back into the tank. Apply vacuum to the fuel pipe and make sure you get fuel through the sending unit feed pipe.