To me that's backwards, to me you should choose your camshaft before static compression.
There's so many people on here that built a 10-12+ cr then want to run stock stall and highway gears, especially with small displacements, now their between a rock and hard place cam wise especially if they only care about streetability not track times.
He already has pistons. Egge are off the shelf pistons. There are not a whole lot of choices left these days unless you have custom pistons made and sometimes that is a compromise. You should chose the RIGHT camshaft for your compression.
Now run your cam spec's and compression through that formula and find out how low your compression really is.