Forgot to leave you the phone number for Power Heads. You might just call them order a catalog, and look at the flow numbers they have on the heads they offer. 714-992-4909 . In my humble opinion, its probably the best bang for the buck. I have no doubt that the machine shop cost, for what you get, will exceed the heads you can buy already assembled. I run TFS twisted wedge on my 306 coupe and Victor Jr.'s on a 306 FB. Also good heads, but a little spendy.
Ron
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