Performance Trends, Larson, and other companies have some awesome computer-connected valve-spring test gauges, such as this one at EFI University. If you set up heads every day in a race shop, automation makes this less tedious. Automatic or manual gauges both require you to oil the springs and cycle them before recording loads for accurate results.

Wheel-guided lifters have been used for the last hundred years. I have seen them on older Harley engines and other applications. However, this has been reintroduced into the domestic V-8 drag-race world recently. My only concern in endurance is slowing down the roller wheel. However, I love the larger wheel.

When the whole building is rocking from a day’s worth of 1,000-plus-hp dyno pulls as intercoolers and camshafts are tested, the marketing department takes photos and video. Nolan Smith (pictured), Trent Goodwin, and Roman Greene have been a huge help with many of the images throughout this book.