How do you go about fixing the fan blower for the heater on a 1970 Buick Skylark GS?

The blower motor is between the firewall, and the fender cowl located on the far right of the vehicle. This cowl will have to be removed (fender well)in order to gain access to the motor. Just remove the bolts toward the rear as the whole thing doesn't have to come off, but some of the hoses and accessories bolted down to the cowl might have to be removed for more flexibility.