There were no Fisch's "blocks from each other." The other Frisch's, the one at Bowling Blvd, wasn't there then. And, of course, Bowling Blvd. wasn't there then, either, I don't remember what, was between the Mall and Shelbyville Road Plaza (home of Levy Bros. and Sutcliffe's among others) in the 60's, but maybe not much. I'm thinking the Pryors became Frisch's in the mid-60's.
That was a Frisch's just east of the Plaza. It use to have a large covered area in the back for cars to park for curb service. My aunts use to cruise there. And I remember Kroger, Woolworth, Gateway, Consolidated, etc. at Shelbyville Road Plaza.
These links have a treasure trove of information on long, but not forgotten places and people.Someone went to a lot of trouble to collect, scan photos and articles and put together this collection. They are PDF files and some take a while to open. They are in alphabetic order.
http://www.ringbrothershistory.com/alsprojects/Waggener/Places%20You%20Will%20Remember%20A%20to%20E.pdf
http://www.ringbrothershistory.com/alsprojects/Waggener/Places%20You%20Will%20Remember%20F%20to%20L.pdf
http://www.ringbrothershistory.com/alsprojects/Waggener/Places%20You%20Will%20Remember%20M%20%20to%20R.pdf