PowerBond Harmonic Balancer - 1990-Up SB Ford 351W - 28 oz. - 4-Bolt - External Balance Oliver Racing Products Cast iron cylinder head is

Cast iron cylinder head is a direct replacement for OEM Chevy 350 head that include 167cc intake ports

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1996-1999 Chevrolet Express 2500

Each intake runner should be matched to the cylinder head port size or Fel-Pro gasket #1206 on all four sides of runner exit

PowerBond Harmonic Balancer - 1990-Up SB Ford 351W - 28 oz. - 4-Bolt - External Balance Oliver Racing Products Cast iron cylinder head isMost standard harmonic balancers are assembled with inserted dampening rubber which won't handle the torque forces and higher revs the modern engines generate. This leads to spinning of the inertia ring resulting in loss of timing accuracy and eventual component separation. Often these balancers are made of relatively weak Grey cast iron which often cracks in the keyways and centre webbing. Even expensive all steel or alloy performance balancers from