Power Building Videos Heads Porting and Valve Trains | 7.75 GB This TRIPLE DVD SET has almost 5 HOURS of highly detailed information! Designed for the guy that isn’t yet a pro engine builder, this DVD set will take you step-by-step through the basics of the entire valve train, including many different types of cams (flat tappet, hydraulic roller, solid roller,), lifters, springs, push rods, various cast iron and aluminum heads and much, much more. You’ll be shown how to read a cam card, and how to degree a cam. You’ll see what “lift”, “duration”, “overlap” and “lobe centers” mean, and how they affect your engine.