Hary, It sounds like you are thinking something is wrong with your fuel pump and that you need to replace it, especially because it is not a stock pump for your car. If you want to replace it with something more authentic, fine. But if you are considering replacing it because you think it's not working right you might as well check it before you do that. It may be working just fine.
Two tests for your fuel pump:
1. Check for gas flow. To do this you disconnect the fuel line from the carburetor and hold it over a container while you crank the engine without the ignition turned on. You should see spurts of gas coming out of the end of the line. If so, you've got flow.
2. Check the pressure. Now connect that loose end of the fuel line to a pressure gauge. I use the same one shown by Flathead Ted in #23. It is a combination vacuum and pressure gauge. Once the gauge is connected to the end of the fuel line crank the engine and watch the pressure. The pressure should be between 1.5 and 3.5 lbs. If it is, and you had flow, your fuel pump is working fine and doesn't need replaced.
