1969 Dart Street/Strip (Re)Build

just so we are both on the same page...you are referring to the lower mount hole in the upper shock mount?

sometimes, it is necessary to remove undercoating, road grime, etc out of that 3/4 hole to get the spacer bushing to seat. .....I always used a small grinder bit with a flat face because the sheet metal was against the upper shock mount..... never notice any gap. I will have to pay attention to the next few I see. It will not change anything. I want it to snug up tight.

most admiring your build would not even know that bolt head is there and it is hard to see on 90% of them.