318 with 360 heads and compcam build help

Question about what you said about not building your engine around the cam your thinking about using. Doesn't the intake valve closing point determine the final pressure the cylinder has? Say he's compression ratio is 8.25:1 and the cams intake closing is 65* wouldn't reduce pressure in the cylinder? I'm not completely saying it's a good idea to build your engine around the cam your looking at but I think that it's something that needs to be taken into consideration.
I was saying, don’t buy some random cam and build the engine and then shove it in the car. It’s backasswards and will be a dog. Pick the cam to suit the car. Not build the car to suit the cam. Speaking of cars, where’s your A-body Dan?