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      I have an 89 block, what style AFR heads would i use?
      These:
      AFR - Airflow Research 1041 AFR SB-Chevy Street Aluminum Cylinder Heads

      or can i use the style with the non center valve cover bolt holes?

      And for the double pumper carb do u reccomend mechanical or vacuum secondaries?
      a double pumper is mechanical secondaries, vacuum secondary carbs only have one accelerator pump circut.

      Any style of heads will work with that block, you're probably best off avoiding center bolt valve covers.
       
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