3 or 4 bolts into the balancer face. 2-groove pulley standard; 3-groove with power steering. Verified by Chris Hackleman (master tech, owner) 2026-07-29, F-100 triangulation review.
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The 1972 Ford F-100 302ci V8 repair data is free for every DIYer and shop on earth, permanently, because Anonymous Sponsor paid $99 to unlock it.
Mitchell1 charges $169/mo for this. ALLDATAdiy charges $30/yr per vehicle. Open Labor Project is free permanently, because of community sponsors like Anonymous.