The folks at Holley Performance Products were kind enough to send us a Terminator EFI, which we recently installed in Hagerty Parts Finder Davin Reckow's classic Chevelle. We test the impact on performance via the "butt dyno," the 1/8th-mile drag strip, the chassis dyno and gas mileage.
https://www.hagerty.com/media/videos/1966-chevelle-holley-video/