This ia an EDELBROCK UR18 Tunnel Ram and UR11 Adapter. It fits AMC V-8s and up. It made the 390 AMX and the 401 Javelins Stand up and BARK... This has been in my garage for 30 years, I long ago sold my Javelin and would like to see an AMC Guy put these to use. Please e-mail me for more info or pics. $.00