from the early '70s:

BOB CALLAHAN DODGE INC
128-134 BLOUNTVILLE HWY
BRISTOL TN 37620
dlr # 57403

the dealership is NOT listed in the '88 Dodge or Jeep dealer directory
Blountville Hwy appears to be Highway 126 & the location would be near the current intersection with Highway 11W (there is a hospital at 350 Blountville Hwy)
freeway interchange construction in the area may have changed the surroundings significantly since the '70s