||12mm spark plugs - brown boot. Block Cast #3L3E-EA. crankshaft Cast #F75E. Left Head Cast #9L3E, 3L3E. Right Head Cast #9L3E, 3L3E.* Customers placing an online Engine or Transmission order will be contacted within 24 hours to finalize order. * Orders placed at an AutoZone Store will not have shipping charges applied. * Ship times may vary based on core availability and build time.