[KamperBob]

This is a great thread - thanks, Phil!

Grain of salt: not all pickup trucks are the same. Differences in height, width, length, cab shape, step vs. fleet side, weight, driveline (gearing, horsepower, valves per cylinder, fuel type & delivery, aspiration, two vs. four vs. all wheel drive) vary across make, model and production year. For trucks X and Y the optimal aero-mod may not be the same solution.