67 Dart 270...Project Old School

I got the driver side head off and installed the cam. I was amazed to find the cam was dead on installed straight up (dot to dot). Now for some bad news or maybe I should have expected it. I measured the pistons to find out they are .088" in the hole at TDC. Using an online compression calculator and using .039" for the stock gasket and 74cc for the stock heads ( the valves in the stock heads have a dish on the bottom making the chamber just that much bigger) I get 7.7:1 compression.

When I run the numbers using 62cc for the EQ heads and .028 for the thinner head gaskets I will run, I get 8.7:1 compression. I was hoping for closer to 9.5 compression. I am now wondering if a 224/230 .050" cam will be too big and turn this thing into a turd.