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ok. so i have a 1980 f250 4x4 with the 351 windsor 5.8l.
first it takes 15-20 min to warm up properly, and if i just go and do not let it warm up i get some pretty good backfire. this is my first truck. i also think i'm lacking some power. i mean my old '85 chevy spring with a 3 banger went faster than this. i put in new plugs and cleaned the carb. (it was bad.) and a new air filter. any help would be very apreaciated. oh yes, it is the origanal engine.