Rotor rubbing holes in top of distributor cap.It  looks like there was a gasket at bottom of distributor that cracked ,dried&missing.Can use a O-ring ?Or is something special?

This is 91 sidekick.

There should be a plastic cover and an O ring or cap gasket there - the O ring is not your standard circular cross section O ring, but a rectangular or flat one - you could try a standard round O ring but there is a possibility that the shape may cause it to slip out as the cap is tightened down.

The hole are burn Thur the top of the cap in a long thin areas .In four spots.I put a O-ring under it Have a .040 gap between cap and distributor place ,does that sound about right?

The hole are burn Thur the top of the cap in a long thin areas .In four spots.I put a O-ring under it Have a .040 gap between cap and distributor place ,does that sound about right?

there is a gasket between the cap and dist. body. tip of the rotor was hitting the cap? must have been grinding out the center too, huh.
gasket material could work also. bet the o-ring is working for you?

Sounds like you need to get the right distributor cap and rotor, might be
the wrong parts were in the last box

Wild

Well it was not rubbing . Found timing WAY advanced about 30 degrees.I cant believe it was running.

WOW! How did it run like that, I mean performance wise?