problems with my distributor

Hello, I'm mechanically inclined, but don't have a vast knowledge of auto repairs. I own a 68 Camaro with a 350. I haven't driven it for awhile and needed to remove one of the heads and in the process I removed the distributor. I marked the position on both the distributor and intake manifold before removing.

Here's the problem! While I had it removed, my wife thought she was doing me a favour and cleaned up the distributor. In the process she removed the line that I had marked on it.

If someone could give me some advice on how to find the correct position for the distributor in "moron" terms, I would greatly appreciate it.

I can find when cylinder 1 is at its highest point and I can also see the intake and exhaust valves open. I also know how to set up the distributor so that cylinder 1 fires. I don't know where it should fire in relation to the other actions (e.g. 5 degrees after the intake valve closes)

Warm weather is coming and I'm drooling to be cruising again. Thank you.