I now have a very nice Edelbrock 255 manifold.  My 55 Tbird is currently running with one Holley 465 4V.  I purchased a second 465 and am awaiting it's delivery.  Soon, I will be mocking up the dual quad setup.  This leads me into a few questions.

1. I can see the runners are a little smaller in the 255 than those in my "G" heads.  Will I need to port the 255 manifold or will it work as is for a street car?
2. Should I port the adapters?
3. Should I mount the carbs forward or backward?
4. I believe I will use direct linkage.  Is this best for a street car?

My 301 cu. in 292 is running perfectly.   It has a moderately bumpy cam and idles at 800 rpm.  The plugs are very clean with almost no discoloration.    The motor is nearly new and I am running a Pertronix unit and coil.  Do you think the second 4V will change my car's driveabilty?  I don't want problems.