power flow ventilation was an option for no ac cars. it had fans that pulled air thru the kick panels and exited it thru the cowl section. I used to wonder why they did it that way and I talked to a retired engineer at a car show and he explained that it had to blow it out the cowl or it would have created a problem with clogging up with leaves and other debris. makes sense. I have a 69 ra 4 gto that has it. fairly rare option. it used a switch on the dash to operate it.
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