another casting number question

[my367s]

This may be a question thats been answered but anyway in a previous post someone mentioned that the heads with a C8AE-H casting # were a good or better head.Is this correct ? Also I have a 4 barrel intake which has an S by the casting # (C7AE-H) and I was told that the S means it was a higher performance manifold.Has anyone heard of this?Thanks Jerry

[willowbilly3]

If you use the C8 heads you will need to get hard seats installed. Ford didn't put them in until the D2 series I think. I couldn't tell you anything about flow but Ford didn't have many options there. Mostly just the garden variety and the high performance variations from the early 406, the 427 and 428.

[FAULKDADDY]

The C8AE-H head is good head. Put some hardened seats on the exhaust side and replace the valves from 2.04-2.05 intakes to 2.090 and 1.55 exhausts to 1.66. A little bowl blending, port matching and you have a really good street head. They have small combustion chambers approximately 67 cc's. Compared to 72-74 for your run of the mill FE heads. So you bring up some compression if you were ever a little bit down in that department. From what I know the "S" intake is a 67 piece from the 67 Gt 390 mustangs. I have used one in the past with a 600 holley on a mild 360 and it worked just fine from idle to 5500 rpm.I would still get a performer over this 90lb hunk though.If money permits. Bruce.