Engine Summary
- Manufacturer
- Buick
- Family
- Buick Nailhead V8
- Displacement
- 401 cubic inches
Also Known As
1966 Buick Skylark Gran Sport 4001966 Wildcat 4451966 MR 4011966 L76 4011966 401 CID Buick V8
Engine profile
1966 Buick 401 four-barrel Nailhead V8
Buick Nailhead V8 · 401 cubic inches · Buick
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
A9 Quadrajet performance option
- Value
- Buick dealer letter 66-128 identifies A9 as the Skylark Gran Sport Rochester Quadrajet option and limits it to automatic-transmission cars. It includes a special distributor set to 12 degrees BTDC initial timing and the high-speed camshaft used by the 1965 425.
- Application
- Late 1966 Skylark Gran Sport performance path associated with the published L76 specifications; air-conditioning and exact production-code claims require car-specific records.
- Type
- engine assembly / other
Sources: 1966 Buick Mid-Size Car Fact Sheet , Buick Dealer Letter 66-128: 1966 Gran Sport Carburetor Options
Cars Using This Engine
1 linked car page.
two-door post coupe, two-door hardtop, or convertible
1966 Buick Skylark Gran Sport 401 Nailhead
1966