Automotive Engine Firing Orders

Guide to Engine Firing Orders:
https://www.onallcylinders.com/2013/01/04/cheat-sheet-quick-guide-to-engine-firing-orders/

"American V8 engine firing order and rotation (where applicable):
    AMC (most V8 engines): Clockwise 1-8-4-3-6-5-7-2
    Buick (most V8 except HEI): Clockwise 1-8-4-3-6-5-7-2
    Chevrolet: Clockwise 1-8-4-3-6-5-7-2
    GM LS: 1-8-7-2-6-5-4-3
    Small Chrysler: Clockwise 1-8-4-3-6-5-7-2
    Big Chrysler and Hemi: Counter-clockwise 1-8-4-3-6-5-7-2
    Most Ford V8: Counter-clockwise 1-5-4-2-6-3-7-8
    Ford (5.0L HO, 351W, 351M, 351C, 400): Counter-clockwise 1-3-7-2-6-5-4-8
    Most Ford modular (4.6/5.4L): 1-3-7-2-6-5-4-8
    Ford 5.0L Coyote: 1-5-4-8-6-3-7-2
    Oldsmobile (1967 and up): Counter-clockwise 1-8-4-3-6-5-7-2
    Pontiac (most 1955-81 V8 engines): Counter-clockwise 1-8-4-3-6-5-7-2 (Note: 307 Pontiac V8 engine rotates clockwise)"

NOTE: the numbering conventions for cylinders differ by manufacturer.

See also (V6 & V8):
https://www.onallcylinders.com/2016/03/16/firing-squad-graphic-guide-common-v8v6-engine-firing-orders/

Engine Firing Order explanation:
https://en.wikipedia.org/wiki/Firing_order
https://www.jegs.com/tech-articles/engine-firing-order-explained/
https://www.carparts.com/blog/what-exactly-is-engine-firing-order/