I have a problem with SURGING ? Let me give you history. I have just completed installing a new (REMAN) into my '84 Blazer it came with a 305 and I replaced it with the same like size and type. All went very smooth with exchange and Blazer has been running great for 2 months since change over. Two days ago I was driving up a long and steep hill and was very low on fuel. I thought that the Blazer was running out of gas as it was surging like it was out of gas and totally empty. When I topped out on top of hill I pulled into gas station and filled up. Problem seemed to be gone. On my way to work today Blazer did the same thing except I was on level ground. It started to surge like it was out of gas and or I was losing an electrical connection. I did not lose lights, my tach did jump during this time but all other systems on Blazer seem to work fine. After about 10 minutes it stopped and Blazer ran fine the rest of the way to work. I guess I will start the process of elemination i.e. check fuel filter, fuel pump, carb, and all electrical connections. DID THIS EVER HAPPEN TO ANYONE AND WHAT WAS YOUR PROBLEM. OR DOES ANYONE FEEL THEY HAVE A VERY SOLID LEAD AS TO WHAT THE PROBLEM MAY BE.