* For the 215 cubic inch V6: 1-4-2-5-3-6
* For the 225 cubic inch V6: 1-4-2-5-3-6 (While technically a different engine, the firing order is the same)
* For the 300 cubic inch V8 (or any other V8 offered that year): 1-8-4-3-6-5-7-2
You need to know which engine is in *your* specific 1965 Buick Skylark 300 to determine the correct firing order. The engine displacement (215, 225, or 300 cubic inches) is usually visible on a sticker or stamped on the engine itself.