[1980grandprixLJ4.3]

Okay so im 20 and fairly knowledgable about older cars im a barter king i love trading and all that. Well ive acquaried a 1980 pontiac grand prix LJ with a 265 4.3 v8 and i was wondering what are the options of carberators i have to swap out the original m2me dual jet 210. Ive seen some online for cheap but idk what all fit my intake i know i have pontiacs 2 year made motor so im just curious. Its all original 67000 miles. Carb i have on it i did s rebuild kit on it and itll wanna fire but im not sure the air fuel mixture screws are correct and if they are then idk why it isnt firing. Good fuel pressure and spark. New rotor and cap and coil and plugs and im just looking for advice thank you guys! #firstforumpost