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Part Number: 40366 (AC Type 40366)
Type: Mechanical Fuel Pump (High Performance / Big Block)
Replaces OEM Reference: GM 6440366
Note: This is the correct factory pump for 1965-1966 Big Block Corvettes.
1965 (Late) & Early 1966: Typically featured a "Round" inlet casting.
Late 1966: Typically featured a "Square Block" inlet casting.
Fitment: This pump is specific to the Corvette chassis (C2) due to frame clearance and clocking. It is not the same as the Chevelle/Impala Big Block pump (which is AC 40358).
fits
| Make | Model | Year | Engine | Special Notes |
| Chevrolet | Corvette | 1965 | V8-396ci (6.5L) | L78 (425 HP) / Late Production |
| Chevrolet | Corvette | 1966 | V8-427ci (7.0L) | L36 (390 HP) |
| Chevrolet | Corvette | 1966 | V8-427ci (7.0L) | L72 (425 HP) |