My suggestion is for you to use the tutorial on the JE piston website and figure your compression ratio with long math and not an online calculator. You can more easily see what changes make the difference in CR.
My KB 162 has a deck height of .031 below the deck with a stock block, unmilled. Yours could be a little different. They have a published compression height of 1.908. They have big(8cc) valve reliefs.
The L 2315F has a compression height of 1.920 and no valve reliefs.
Another cast stock type Sealed power piston has a lower CH. It’s 1.848. It’s part no 366AP.
I’m using 87 cc 452 heads.
Stock shim steel head gaskets were .023 and the felpro blue is .039.
Like I mention earlier, 516 closed chamber heads should be around 80 cc.
Good luck.