69 302 (Z28). Deep double groove. Reproduction includes correct part number stamping and coding as original. Stamped steel. Replaces GM Part #: 3956668. Please Note:Stock replacement pulleys are not designed to exceed 400 horsepower or 6,000 RPM. Using reproduction pulleys on engines in excess of these limits my result in catastrophic disintegration of the pulley causing severe damage to the engine, cooling system and body damage. Classic Headquarters and Auto Metal Direct assumeno liability for damages caused by improper usage of pulleys. Please be sure to install the pulley properly to avoid damages that could occur from improper installation or exceeding recommended RPM limitations.

396/325-350 HP also 427 exc. special hi performance & 454. Double groove. Faithful reproduction includes correct part number stamping and coding as original. Stamped steel. Replaces GM Part #: 3955290. Please Note:Stock replacement pulleys are not designed to exceed 400 horsepower or 6,000 RPM. Using reproduction pulleys on engines in excess of these limits my result in catastrophic disintegration of the pulley causing severe damage to the engine, cooling system and body damage. Classic Headquarters and Auto Metal Direct assumeno liability for damages caused by improper usage of pulleys. Please be sure to install the pulley properly to avoid damages that could occur from improper installation or exceeding recommended RPM limitations.

High performance 396/375. Deep double groove. Faithful reproduction includes correct part number stamping and coding as original. Stamped steel. Replaces GM Part #: 3955291. Please Note:Stock replacement pulleys are not designed to exceed 400 horsepower or 6,000 RPM. Using reproduction pulleys on engines in excess of these limits my result in catastrophic disintegration of the pulley causing severe damage to the engine, cooling system and body damage. Classic Headquarters and Auto Metal Direct assumeno liability for damages caused by improper usage of pulleys. Please be sure to install the pulley properly to avoid damages that could occur from improper installation or exceeding recommended RPM limitations.

Faithfull stamped steel reproduction with correct part number and code die stamped as originals. Indispesable when adding air conditioning to long water pump motors, including Vintage Air and other aftermarket A/C kits that do not include needed pulleys. Replaces GM Part #: 3937787. Please Note:Stock replacement pulleys are not designed to exceed 400 horsepower or 6,000 RPM. Using reproduction pulleys on engines in excess of these limits my result in catastrophic disintegration of the pulley causing severe damage to the engine, cooling system and body damage. Classic Headquarters and Auto Metal Direct assumeno liability for damages caused by improper usage of pulleys. Please be sure to install the pulley properly to avoid damages that could occur from improper installation or exceeding recommended RPM limitations.

55-72 Small Block Single Groove Crankshaft Pulley without AC, (6-3/4" Diameter). Stamped 3755820-BC GM GM Group #: 0.659 GM Part #: 3755820

Faithful stamped steel reproduction with correct part number and code die stamped as originals. Indispensable when adding air conditioning to long water pump motors, including Vintage Air and other aftermarket A/C kits that do not include needed pulleys. Replaces GM Part #: 3972180. Please Note:Stock replacement pulleys are not designed to exceed 400 horsepower or 6,000 RPM. Using reproduction pulleys on engines in excess of these limits my result in catastrophic disintegration of the pulley causing severe damage to the engine, cooling system and body damage. Classic Headquarters and Auto Metal Direct assumeno liability for damages caused by improper usage of pulleys. Please be sure to install the pulley properly to avoid damages that could occur from improper installation or exceeding recommended RPM limitations.