Pete, I can be a very funny guy sometimes!!!.
In this case I'm A CLOWN. Barnum & Bailey certified.
I was measuring the turbo inlet........
The side I should have measured is 80mm and there are TBs available here.
I started fabricating a plug for the top of the plenum.
If I get this right the SCTA/landracing.com will have to give me a cap of some kind.
Maybe Black and Blue?
?.
The tie in between the manifold runners, venturis, plenum base and fuel rail will
boggle the minds of all those European designers with no respect for the poor
fool that has to work on the stuff.
I'm up against it here.