Changing cam timing does not always mean a new timing set. An offset crank key indexes the crankshaft sprocket a defined amount, moving the whole cam event with it, which is a cheap way to shift where the engine makes its power once you have degreed the cam and know which way you want to go.

Mr. Gasket 983G Hardened Crank Key Features:

• Fits Chevrolet 283-400 Gen I Small Block Chevy engines.
• Offset cam and crankshaft key increases torque and horsepower within the operating range you select.
• Long style.
• Hardened steel construction.
• Black finish.