Here is my situation, 1996 GT with original tired NPI motor. On engine stand I have 2009 4.6L 2v out of a police interceptor with wiring harness. This motor would be the same as a 2004 GT. I'm freshening this engine and installing springs and cams. My original thought was to use 96 wiring harness and ECM since the 96 has stupid PATS and my SCT X4 already married. Is this my best route for tuning or should I find a later model computer and use the 09 wire harness and have that ECM tuned? Also, with the newer ECM will that eliminate the PATS or cause problems? Thanks in advance!