Joe, I sent my harness to a man in Anderson Indiana [SPEARTECH FUEL INJECTION]. John reworked my factory harness to eliminate a bunch of functions that I did'nt need, [emissions] the engine will run without things like second set o2, evap, air, egr,purge,etc.. John can also custom build you a harness, but I felt that I could use the money somewhere else in the project.With the factory rework, the pcm will remian in its factory position and on the C series truck it is in the left front under the batteryand since my lemans had the battery on the left Ithought I could make it look more natural.I fabbedup a mount to mount the pcm behind the battery and it looks good. John also can reprogram your pcm to make it more friendly to your car.I am in no way connected to this company with the exception of being a happy customer, he did what he said when he said for the price he said.
www.speartech.com also check this site ls1tech.com. jim