Re: 396 30 over need finishing need some advice???
Iy you ask me you are pushing the limit or possibly past it with that intake and injector choice.
You will need quite a cam to pull off 550hp in the small cube power plant unless your heads flow really good.
We are talking a really good port job and a cam in the high rpm style...
You will need to be shifting that one around 7800 minimum in my book
And a good set up chassis and gears in the 456 range ...build it the way they did in the late 60's early 70's and you can have a quick small cube BBC
Although if i had to do it i would pick a good solid lifter cam in the 250-260 @.050 range and keep lift under .600" so that it is easier on valvetrain parts...I still like my 456 gears...i would also break it in with a single 4 carb and then install a tunnelram with 2 600 or 750 carbs...of course i am old school.