1990 Mazda Truck fuel pump

Electrical problem
1990 Mazda Truck Two Wheel Drive Manual 150,00 miles
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I have a mazda b2600i pick up and i dont know were the fuel pump is, I dont want to drop the tank if its not in the fuel tank, it is fuel inject. and were would you find a chasey number, the parts store needs that so i can find the wright fuel pump

Thanks Mike