This is to adapt a Small block 5.7 1.75 bore throttle body (TBI) To an intake with a Holley 4412 500cfm - 350 2300 or early Autolite pattern 

1" thick with tapered ports for airflow and proper fuel atomization

Includes a high quality felt gasket and bolts as pictured

Items ship in one day many the same business day payment is received.