Having been involved with KPUR since I was in high school many tears ago, I can fill in a few blanks. They sponsored an Explorer Scouts post for several years. I was in it.
The land became much more valuable that the radio station in the late 60s &early 70s. Construction of the new transmitter site south of town was begun so that the land (except for the small pad where the studio stood) could be sold for a new Walmart and shopping center. The station was originally KFDA and was on T-Anchor Boulevard before I-40 was constructed. After I-40 it was just west of I-40 and Grand St. on the eastbound service road. It was a three tower array, one tall and two short. 5000 watt omni day and 1000 watt directional at night. The new site was just east of Osage St. and south of Hollywood Road (which would become part of Loop 335). After graduating high school in 1972, I got my first announcer job at KCAN in Canyon just south of Amarillo. After about six month, I had had enough of the lunatic that owned it and quit. When KPUR found out I was available, they hired me part time to assist the new chief engineer, George Taylor. It was my job to setup remote broadcasts using a Marti transmitter and to assist George as needed, especially studio maintenance so as to keep him free to setup the new transmitter site. I already had some electronics training and George was an excellent teacher and engineer.
Eventually in 1990, I ended up there as a contract chief engineer. I had the contract on and off several times due to ownership changes. The last time, I oversaw the relocation of the studios to the building where KLSF-FM was located. In 1993 the old studios were demolished and a Taco Villa restaurant was built in its place. The Starbucks is just east of the old studios. According to Google maps, the Taco Villa is still there. Although at one time it was part of another taco chain that went under (Taco Bueno), it appears to have gone back to Taco Villa.