Hello all--happy to have found this forum. New to G-body's--I bought the sweet 86 442 a year ago. It's in pretty nice original condition but I've been going down the list of fixing all the little things that don't work. Right now, I'm working on the HVAC system to get the A/C and heater to blow through the dash vents. Judging from the info I've gotten from this forum it looks like a vacuum issue. Anyway--happy to be be here! 😁