MCS-510565 - The pre-1978 early manifold; is sealed with o-rings between cylinder head and manifold. This kit includes adapter rings that allows you to convert to the early style pre-E78 ''o-ring system'' to the late style L78-84 ''band style'' system. Includes ada

Fitment:
66-E78 B.T.; 57-78 XL (NU)