interior swap

hello my project in a 69 barracuda, fastback formulas s car 340 4 speed :burnout: , my brother just picked up a 67 fastback, 273 auto car :sad1: . he will get there. i have red and want black, his is black and wants red, the big concern is the big interior sails on the inside, will they swap over and my interior has the suction for rear defrost where is the blower motor for that in a 67 barracuda fastback.