9.5 to 1 on a turbo motor??!! Iv always run 8 to 1 on my 2.3 turbo cars, and it worked well.
I would think that the custom log manifolds would flow more than a set of factory manifolds
As for the carb thats what i was told to run by the place that is going to set it up for blow through, but I will ask them about it again.
I was also told that a single plane would be easier to setup and tune.
Not trying to argue with what you said, just different than what Ive been told befor.
Thanks