There looks like 8 stalls installed, but not active yet, at the east bound travel plaza in Rolling Prairie, IN.
Location link: Travel Plaza 3, MP 56 Eastbound - Rolling Prairie
This may be an odd source, but I was reading about a guys road trip experience in the mach e forum. In post 15 he describes the location and included a picture of the supercharger stalls taped off. (Source)
Location link: Travel Plaza 3, MP 56 Eastbound - Rolling Prairie
This may be an odd source, but I was reading about a guys road trip experience in the mach e forum. In post 15 he describes the location and included a picture of the supercharger stalls taped off. (Source)