Edelbrock part #3701 Performer EGR intake manifold is designed for street 1955-86 small-block Chevys. This manifold accepts late-model choke, water neck, air-conditioning, alternator and H.E.I. Has provisions to add oil fill tube. Not for 1987 and later cast iron or Chevy Bowtie heads. Will fit 1987 and later stock aluminum heads.