TDC mark on the crank doesn't mean the distributor rotor is pointing to the 1-st wire. It was set to the 4-th before, I think
Sorry, I didn't see this when before I wrote my second post. That is helpfull and makes sense.There are two marks on the cams. Lobes pointing outward is TDC #1, lobes pointing inward is TDC #4. With the head off and both #1 and #4 at the top of the stroke it will depend on the position of the distributor rotor as to which one is at TDC.
Just leave it as is. It seems that you inadvertantly fixed a minor problem without realizing it!does it make a difference if I just keep running it this way? Or do I need to go back in, undo the chain, flip the cams and rearrange the plug wires again?