Mines just a guess. I would have said 9.5 or so, but he said the block was decked too.
So I went with a 9.8.
Althought your builder says 9:1. Maybe on the port job they enlarged the combustion chambers, and milled that to compromise?
Sky
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-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
50-175 Nitrous Works WET Kit just added.