74-91 Aluminum Dual Sheave Main Pulley (11469)

The Aluminum Main Drive - Double Sheave Pulley for virtually all 1974-91 12A and 13B engines is designed for high performance/RPM street and moderate racing use, slowing the water pump and alternator 13-15 %, thereby reducing cavitation and power loss.

The stock air conditioning pulley is accommodated. Timing marks are provided at 10 degrees ATC, 0 degrees (TDC), 10 degrees BTC, and 20 degrees BTC.