Going through the paces of removing the Edelbrock dual quads off the 66 fastback with the CJ in it.Owner changed his mind and I was more than happy to yank it all out.I am putting a old school F-427 on it.I pulled Jays book out and read up on the manifold.Jays write up hinted that a port match was in order so off to the shop to do some measuring...
Jays 2 manifolds had 1.06 x 2.05 ports and no provision for a oil filler.Visible bottle neck near the port exit..
My manifold is unported and has 1.18-1.20 x 2.05 ports and has a provision for a oil tube.Also no signs of a bottle neck.
Going by the pictures the manifolds appears to be the same..
One early,one late,two different foundries,revisions......who knows but certainly 2 different versions of the same manifold...