I have a 6.0 Ls and a 4l80e that are both still stock. I will be putting them in a 1972 GMC 3500. I do not have the stock wiring harness, fuse block, or ECU. Can I use a standalone wiring harness and the Terminator X Max to wire the stock Ls and stock 4l80e for now, and then in the very near future use the same standalone harness and Terminator X Max for the same combo, but rebuilt to 500hp to the flywheel?
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Thursday, August 24th, 2023 AT 2:58 PM