Ok that is a big difference. I wouldn't have imagined they would call that much compression difference a fair comparison.
And a 10.73:1 stroker motor with that bone stock cam isn't going to run a pump California 91 octane around here.
The OP is starting out with a cam that seems a little bigger than the 2nd cam they put in that 360/408 test. And better heads. Wonder if that more performance starting point would respond the same.