I ran an Ultadyn H10 cam that was similar. Ran good when it was on my 455 with Torquer II intake a Holly 3310 and a 3 tub headers. I put that motor in my FB with LBM, stock intake and Q-jet than it was terrible. Had nozzle drip and stunk up everything around it. Burned my eyes just thinking about it.
My conclusion was the Qjets just don't work to well on the idle circuit with that low of vacuum (Cliff Ruggles agreed) and I didn't wan't to alter the Qjet to make it work better. I tired trick after trick eventually I changed to the Stump puller roller cam on a 114. The car now sounds stock and has loads of vacuum, but it faster then the old cam.
I watched your youtube and the car sounds awesome.
You shouldn't need much of any vacuum advance if you have the A/F setup well. 6-10 deg should be about it. If you get a skip sound at idle your have too much. That is really the sign if you should use ported or manifold vacuum. I try and go for the most amount of initial I can and still stay at the 36 total for iron heads. I have my initial at 18 and 10 on the crane vacuum can. I did some mods to my small body hei to make this all work and a limiter plate that cam with the can. 18 initial gives me much more off idle torq. Some people however may have starting issues with that amount of initial.