I realize now that my comment about breathing may not be entirely accurate. The Z got higher comp. via a stroker kit so it is pulling air in harder on the intake due to the longer stroke. You got your by decreasing combustion Chamber volume.You are on the right track about the Timing maps and fueling. If I were you I would look at warmongers post in the 3L conversion forum about the Greddy Emanage. It might just be the answer.
