Several quick and easy checks:

I recall that before the paint job, when I washed the 78 I could get my hand holding a towel between the window glass and the side of the mirror housing. The top of the mirror housing appeared mostly level.
After the paint job I could not, the mirror housing leaned too close to the window. The top of the mirror housing appeared to lean in towards the window with the outside edge higher than the inside edge.

When sitting in the 78, mirrors adjusted, I can see everything I need to see behind and beside me. After the paint job, I could only see the fender swells and the back window pillar, no matter how I moved the mirrors around in their housing.

It took removing the mirrors and flipping the oval wedge piece around to place them properly for easy viewing.
Heidi

ps...no questions are dumb, only the unasked ones because they will never have an answer.