1956- Airtex & Carter Fuel Pump differences

I have an electric pump already installed, in fact, I have been running off it for almost 2 years. I have found that after a long drive, when I am in line for ice cream takeout, the pump will suddenly become very noisy. I checked and there is a regulator in the line right after the pump. I still want to put in the mechanical especially for the wipers. I actually researched a small 12v electric vacuum pump to run the wipers independently of the engine. With vacuum they work fine until you open the throttle. I though of changing to electric wipers but I have heard the dash needs to be removed which is not something I want to tackle.
 
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