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I'm looking at building an intake for a new combination and it seems that the Yates SC1 port layout will work for me. Is there anybody out there that has a Yates SC1 head, intake or gasket that can measure the port spacing for me?

I'm looking for something close to the following;
First to second, runner: 4.625
Second to third: 4.375
Third to fourth 4.625

I also need to know how big the intake port on the manifold can be opened up to.
 

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I'm looking at building an intake for a new combination and it seems that the Yates SC1 port layout will work for me. Is there anybody out there that has a Yates SC1 head, intake or gasket that can measure the port spacing for me?

I'm looking for something close to the following;
First to second, runner: 4.625
Second to third: 4.375
Third to fourth 4.625

I also need to know how big the intake port on the manifold can be opened up to.
SBF bore spacing on cylinders is 4.380", intake port spacing should be the same.
 
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