The scariest part of most engine conversions is the dreaded electronics. We decided to make life easy on ourselves and leave the cutting and splicing to the experts. This required that we send both the donor vehicle’s V-8 harness and factory 2.5L harness along with the fuse block to Hotwire Auto. Be sure to let the company know if you’ll be converting to an automatic transmission from a manual, as this will require an extra fuse and insert. We’ll show more on how Hotwire Auto makes engine electronics a plug-and-play affair in Part Two.