Check my work-Chime in please

Below are the cam specs for the cam "on the shelf". The bore number comes from the stock bore + .040 overbore. FWIW I come up with 8.471 dynamic as well. I want to push the envelope a little bit but also want to buy gas for the car so I am asking myself "is it too close to the line"? No point in spending the money to build a 273 if you are not going to make it run like the 67 commando's ran back in the day-right! Looks like I could buy a thicker head gasket or a cam with a little more duration. The Lunati #60402 (old number) fits the bill and takes the same lifter/spring/valve height setup I already have. If I leave it like it is, will the engine run?
Once again group-thanks for the help!
"Nervous as a cheerleader on game day"-----DR:prayer: except the seahawks!