My memory of The Swan Yardley ends in 1963 when I left Joe Lucas at Marston Green. I hardly recognised anything when I looked at Google maps, and The Swan is no longer there.
There is a program called elevation finder :
https://www.freemaptools.com/elevation-finder.htm and going to where the Swan used to be more or less, there is a Swan Shopping Centre and the elevation is around 128 metres or 421 feet.
You can zoom in on UK,then Birmingham, then to the Coventry Road and the Swan area. Clicking on the map gives the altitude.