When changing your cam, it's essential to change your timing chain and gears. We recommend using this one from Edlebrock to complete your high performance package. They have solid-bushing chain for a true bearing surface that rolls with sprockets, eliminating chain stretch. Crank gears are machined from SAE-1144 stress proof steel. Fits 1967-91 with AMC 290, 304, 343, 360, 390, or 401 V8 engines.