Do you know if there is an actual on line diagram for the firing order of a 350 Chevy v8 to see which ones are distributor?

There isn't one single, universally agreed-upon "online diagram" for the firing order of a 350 Chevy small-block V8 that specifically highlights which cylinders are connected to the distributor. The reason is that the visual representation depends on the orientation of the engine and the diagram's creator's choice of presentation.

However, you can easily find the information you need by combining a couple of readily available resources:

1. Firing Order: The firing order for a standard 350 Chevy small-block is 1-8-4-3-6-5-7-2. This is almost universally consistent. You can find this information on countless websites and in many automotive repair manuals.

2. Distributor Cap Wiring Diagram: Search online for "350 Chevy distributor cap wiring diagram." These diagrams show the arrangement of the wires inside the distributor cap, connecting to each spark plug. The order of the wires on the cap *directly corresponds* to the firing order. Number 1 will be the first wire in the firing order sequence on the cap, 8 the second, and so on.

To get the information you want:

1. Find the firing order (1-8-4-3-6-5-7-2).

2. Find a distributor cap wiring diagram.

3. Match the wire numbers on the distributor cap to the firing order. This will show you which cylinder each wire (and thus, each spark plug) is connected to.

Keep in mind that the orientation of the engine in the car will affect how you visually interpret the diagram in relation to the engine itself. The diagrams often show the engine from the front, but your view might be different.