I had some time to kill at lunch...

for a 454cid motor, you get 56.75cid/cyl = 930cc/cyl = swept volume (SV)
So in this instance, to determine CR, we have:

CR = [SV + (total combustion space)]/(total combustion space)

where: (total combustion space) = volume of the combustion chamber (call it CC) plus other volume (+/- depending on dishes or domes, gasket thickness, etc...call it X)

CR = [SV + (CC + X)]/(CC + X)

tickle the formula a little and you get:
X = [SV/(CR-1)]-CC

So based on a 454cid and the information provided with my pistons
X = (-7.1)

Now using my values... SV=930, CC=118, and X=(-7.1)...I get a CR of 9.39/1 If I have screwed up somewhere...jump on it and let me know. All input is welcome!