The fresh air vent control has three cables that attaché to valves in the frunk; two go to a valve on the drives side ( see pic ), and one attaches to the fan box.
Question is: if I release the two cables on the driver side valve will the fresh air control pull out enough to access the back ?

Given the huge time constant re replies to this post, I think you're about to give us the answer. I would have dug in by now. Be careful, I see lots of sharp edges.

I agree; thinking the tank needs to come out and fan housing is gonna have to come out in. order to access all three cables; did this years ago.

I think y'all are correct. BTW, I have never got the air to come out of my dash vents since my rebuild. Is there a diagram for these control cables somewhere?

Maybe this Link (below) will help. Mark those cables very good. It can be done without pulling tank or air box but it is a Bitch! Ask me how I know.

http://www.914world.com/bbs2/lofiversion/i...php?t86942.html

How far could the control be pulled out ? I want to access the bulb holders.

Control will come out somewhat. After you disconnect cables in Frunk it'll pull right out.