Was main street ever actualy called east temple? Seems like I was curious about that once but couldn't find anything to support it.
I know that prior to some time in the 1960's the center of our street grid use to be the entire temple square block. This made it impossible to give everything on the block a proper addresses. So the center of the grid was shifted to the intersection of main and south temple. This resulted in all the north/west streets being shifted by one block 300 west actualy use to be 2nd west.... This is also when they switched from using 1st, 2nd, 3erd to 100, 200, 300... So if you have ever wonders why so many utahns refere to a street like 600 south as 6th south... That's why... It actualy use to be that way.
I'm not sure if east temple would be a good name for main any more.... It doesn't actual go to the east of temple square. Maybe state street could be east temple
Here is the intersection of 300 west and north temple when it was still called 2nd west... Notice the street sign.... I remember when they tore down Denny's in the 80's. They built taco time in it's place (it's now a subway). The ironic thing is that it appears that the overpass is being paved... Just as it is now. I should try to get a current shot

I got this from google maps.. So the perspective is kind of skewed.