Valvetrain stability starts with proper pushrod length. Crocie used an adjustable pushrod to minimize travel across the tip of the valve. Even with mild valve lift, pushrod length is critical for durability. Because of the small-diameter 5⁄16-inch pushrods, he opted for 0.116-inch-thick-wall Smith Bros. pushrods exactly 9 inches in length. Note that at max lift, the roller tip is very close to the valve tip centerline.