This is an 87-92 Camaro/Firebird TPI intake manifold but the two center holes on each side have been modified to work with pre-87 as well as 87-92 heads.  This manifold was used on 87-92 TPI cars and is casting number 10066015.  It is in good condition with no damage and the water neck bolt holes are clean and in good condition.  It has had some smoothing done for polishing but has not been completed.