dssur
+1y
I've seen some B2000-B2200 trucks with different AC mounting brackets, come to find out the dealer installed many of the early systems by outsourcing the job to AC shops. Thats why some AC buttons on the dash look different. If your truck came stock with PS, but not AC, that is likely your problem.
You may have to get an AC bracket from another truck. Unfortunately, the bracket is usually partly behind the motor mount, which makes for a long tedious job to both get one off the donor truck and also to install it.
Alternatively you can modify the brack to clear the header. It should clear with only a slight move.