Swap Hydraulic Roller for a Solid Roller Cam - What A Drag, Part 8 Photo Gallery
 Initially we set our adjustable pushrod length tools at 0.500-inch longer than the hydraulic roller pushrods. This worked fine for the exhaust rocker (left), but not for the intake rocker (right). The intake valve has a different angle (canted towards the intake manifold), causing the rocker body to interfere (contact) with the adjusting nut (right pic). We needed to lengthen the adjustable pushrod another 0.200-inch (for a 0.700-inch longer intake pushrod) to eliminate the interference issue with the intake rockers.