<VV> Identify 140 exhaust manifold?

[Les]

I have a pair of exhaust logs on the shelf here. I have a pair of (ooooh 
pretty) rebuilt 140 heads here too. The logs fit on the heads. How can I 
tell if I have proper 140 manifolds or something else? Casting #, 
measurements, etc.?

Thanks,
Les
'65 Cdn Corsa Cvt 140/4