Alternator 12V 1 Groove for GM 327 350 396 427 454 1971-1986 ES1001BK AF42701100

Alternator for GM

This 12V alternator with a single groove pulley charges the battery on small block and big block GM engines and cross-references ES1001BK and AF42701100.

Overview

This 12V alternator provides charging current for GM 327, 350, 396, 427, and 454 engines. The single groove pulley matches early v-belt drive setups. It suits owners restoring or repairing older GM vehicles and engine swaps.

Built For Performance

• 12V output for standard charging systems
• Single groove pulley for v-belt drive
• Fits small block and big block GM engines
• Cross-referenced to ES1001BK and AF42701100
• Sealed housing for dust resistance

Fits These Machines

• for GM 327
• for GM 350
• for GM 396
• for GM 427
• for GM 454

On-The-Job Use

• Classic car and truck charging systems
• Engine swap wiring setups
• Replacing a failed alternator
• V-belt accessory drive refresh

Specs At A Glance

Good To Know

Q: Will this fit my GM engine? A: It is listed for 327, 350, 396, 427, and 454 engines from 1971-1986. Confirm pulley and mounting style on your setup before ordering.

Q: Does it come with a pulley installed? A: The unit is supplied with a single groove pulley as listed. Check belt alignment after installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.