I contacted the Registrar of Imported Vehicles,
www.riv.ca, when I was looking at a Jeep w/ a LA kit, they said that ANY vehicle with modifications to stock tire size or to ride height would not be allowed to cross the border. If you already have the vehicle across, I'd like to hear how you got it across. I'd love to get a lifted vehicle from the US because they are so so cheap now.
If you don't have it across the border, I have heard that the Coutts border crossing is extremely sticky because they are the closest border crossing to the US Border Patrol training center. I've heard from guys in BC that the crossing near Aldergrove is somewhat leinient.
I don't have an answer on where to get it inspected because I've called around and only certain shops are allowed to complete the inspections, used to be CT. I spoke with the manager at the Shaunessy CT and he said they won't pass anything that is not stock ride height. In Southern Alberta, Ranchlands Ford is the certified inspection facility, try them out.