I see a number of different values used for Manifold Intake Volume in LS3s. I have the common 12602477 intake found on a lot of crate gen4 LS3s. I see different values (from the repository) for manifold intakes from stock LS3 tunes of 9.59, 13.487 , 10.5 and 14.0?? Anyone know definitely what volume (not flow numbers but static volume) should be used with that intake manifold.