Cam / Compression Ratio

Same here.

Just make sure the approach to the whole build is pointed towards the same goal.

Using the Wallace calculator........... for a 9.4:1 318+.030, with that 255 Howard’s cam, in at 106, at sea level, I got just over 8.0 dynamic, and 165 cranking pressure.
I came up with a 7.42:1 dcr and a 9.69:1 scr. I used a online scr / dcr calculator.