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  1. Alfa 33, Sud & Sprint
    Dear all, can somebody help me please? I purchased ARP 2000 200-6227 general replacement con-rod bolts for my Sprint 1500 engine build. I have to drill and tap because their thread is 3/8 UNF as opposed to the standard 9x1mm. But alas, I noticed that the ARP bolt head is too tall and will...