How to Choose Camshafts & Time Them for Maximum Power By Des Hammill. Choose the right camshaft the first time! From the smallest 4-cylinders to the largest V8s, this guide covers pushrod operated valve engines, single ohc engines, twin ohc engines, and camshaft timing techniques for all engines. Includes coverage of durations, lift and lobe phasing, finding the best possible camshaft timing position every time. Detailed information that will assure maximum performance! Sftbd., 8 1/4"x 9 3/4", 64 pgs., 100 b&w ill.