Jim,
I bought Jamo's "old Butler" and although, we're stroking and re-heading the engine and may (repeat, "may") be going to fuel injection, the manifold in question is, in fact, an Offenhauser(!) item. I am going to stroke the present 351C to either 393 or 408 ci, in order for the mill to "catch up" to the massive flow from the heads. Clevelands, as you no doubt know, were famous for high-revving, "late-waking" power. With modified aluminum "Aussie" 2V heads, etc., I, also may have to move to a different manifold. We'll see. But the present one is an Offenhauser. E-mail me in a bit, and I'll have mark #s for you---the engine-bits are in my friend's garage, awaiting reassembly. Four months off the road is enough!!
E-mail adddress is
douglassf@aol.com
incapable of handling the massive