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I have a 73 super the problem i am having is the right headlight burns very dim.I have checked the ground which is good.any help would be appreciated.

Low in circuit voltage to the headlamp, or your good ground is bad.

Bad ground on that side is a likely suspect (it's the brown one in the pigtail harness coming into the trunk from the fenderwell).

Another problem, usually encountered after a fender's been changed, is that the three wires going into the plug on the back of the headlamp bulb are connected improperly - typically that puts the hi & lo filaments in series, increasing the resistance and causing a dim condition.

Looking at the bulb from the back, the wire going into the 12:00 position should be the yellow (low beam) one. The white high beam wire goes into the 3:00 (outboard on the RH side) position and the brown ground wire goes in at 9:00. The connectors each have a little tab which locks them into the 3-prong block, if they need to be rearranged it can be compressed by going into the end with a tiny screwdriver.

High, low, or both?

yes there is just a glow on that side.

Another thing to do for symptom elaboration: remove the fuses for the left headlamp (both high & low beam) to see if that makes the right side "glowing" stop. If it does, that's nearly-positive confirmation that the ground is bad on the right.

An open ground could be a problem inside the bucket, even a broken lug on the lamp itself...