Bump to ask a question about a gate. Joe Bass, if your brother comes back with an answer, please post.
MotorcycleMike, I just spoke with Little Bass. Nada to the DekBlock idea. Too much movement. 4x4 lagged to wall should give needed clearance. If you want a little more, add a 2x4, screwed to lagged post. He advises against the 6x6, as more difficult to secure. This gate should be 3.5' - 4' max.
He also said it's possible that your plants suffocated your a/c. (I also have an hvac guy).
Finally, the joker told me to give you this:
Invoice # 678332
Advice for gate $85
Text time fee $20
Hst. $13.65
Total. $118.65
I told him when he gets his bike, he can hit you up for advice. ?