Everything is back together, the center vent flap had been blocked open, I re-connected the lift arm,ut it don't work! always blows to defrost, economy gauge works, I was told this shares vacuum with the center vent source, I have many many threads about how to check why center vent inoperative, but so many theories I'm a little confused! Isn't the vacuum pot for the center vent the oneto theleft of the radio opening? when vacuum is applied with a hand held vacuum pump, to either ports on the pot (or actuator...don't remember where I got vacuum pot from), either both at the same time or one or the other with one blocked off, no action, won't hold vacuum! but now my fresh air vents are working!
Just what is the procedure for checking the center vent pot? oh, and it looks like the heater box was repaired, can see a crack that was re-inforced with piece of aluminum.

Thanks,-DDaymen