[Captkaos]

All the old SBC's use the same firing order 18436572 regardless of what type of distributor be it points or HEI, (yours is HEI with computer advance)

You can put the number 1 terminal anywhere you want it, you just have to put the engine on TDC and where ever the rotor is pointing the plug wire for the #1 cylinder should be at the terminal that corresponds to where the rotor is.

Generally it is on the right of the 2 front terminals if looking into the engine bay, where I would recommend putting it.