Wiper wiring help, Please

Mine is a thumb wheel radio and has factory A/C, will this still work?
The a/c vent assembly would have to go first. That radio is mounted differently too.
In your car it might be easier to lower the steering column and pull the rallye bezel out and down. The wiper motor is directly behind the heater controller.
Several different ways to get there. Through the cowl ( pulling the wiper motor ) sux ! Good luck what ever route you take :)