
Would I be right in thinking the 1600's dont have an inlet gasket but the 1700's do? ie one that can be copied to produce a flange?
Are they all the same in terms of port shape/size and stud patterns?
I'm feeling the need to expand my product range! 
yep your right
The 1600s have a plastic manifold and rubber gaskets on each port. The 1700 has a metal manifold and (presumably) a regular paper gasket...
The 1700 'gasket' is actually a 5mm thick plastic plate that holds the port sealing rings on each side. I guess that in effect it is the same as the flange only of the 1600 plastic manifold.
Nice one, thanks guys.
From searching google images I did see a few pics of a reasonably thick looking gasket so I guess thats what I need. 
That gaskets are over £50 from ford I have one you can borrow but need it back for my engine
Dan, I don't need an inlet as I have DTH TBs, but am waiting for your exhaust flange for an SE...
DH2
I'd sorta put that on the back-burner as they're already available on ebay from kitspares aren't they?