Video 748 HP Big Block Chevy Some engine builders breakdown a big block chevy engine and discuss its timing, valve springs and more. Advertisement ByGreg Jones on Aug 14, 2015 AdvertisementClick Here to Read MoreAdvertisement Advertisement In this article:Big Block, Chevy, timing, Valve Springs Video: Understanding Valve Springs – Part 2 Video: Turbocharged 460 All-Billet Wagler Duramax Video: 502 cid LS Engine Video: Intellectual Horsepower Ep. 3 Advertisement VIDEOS Watch Engine Builder's latest discussions and explanations. SHOP Shop the latest Engine Builder merchandise. SUBSCRIBE Stay up to date by signing up for the Engine Builder newsletter.