Difference between 318 ARP head bolt options

Uncle Bob said

I think what he wants is the second photo "Exc. W-2, W-2 Econo heads or Edelbrock RPM heads" Exc. is short for Except - Right?

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Yeah, that makes sense. If I remember correctly, the W-2 and the Edelbrock heads require two extra long bolts and the first one has four long bolts so that would be for the W-2.