Where is number 1 at on a the distributor cap for 70 Chevy 454?

The number 1 cylinder location on a 1970 Chevy 454 distributor cap isn't directly related to its position on the cap itself. The cap's numbering reflects the firing order, not a consistent physical location.

To find #1, you need to know the firing order for the 454. A common firing order is 1-8-4-3-6-5-7-2.

With that firing order, you would:

1. Identify the #1 spark plug wire. This is usually marked on the wire itself or you can consult a wiring diagram specific to your engine.

2. Locate where that wire connects to the distributor cap. That terminal on the cap is marked #1.

Important Note: There's a chance your engine may have a slightly different firing order (though less common) due to variations in the engine's build or aftermarket modifications. Always double-check with a wiring diagram for your specific engine or year. You can usually find these diagrams online or in a repair manual for your 1970 Chevy 454.