I have a 1983 S10 Blazer with the 2.8l V6 engine. I'm experiencing some hesitation as I pull hills (never has pulled hills well, but now i'm getting spitting and sputtering). I've replaced plugs, wires, cap and rotor and replaced the air cleaner. I'm thinking its with the fuel filter or the fuel pump, but I can't find the fuel filter to replace it. Can anyone tell me where that's located on the 1983 S10 Blazer?

Thank you in advance.