Timmyboy,
There is much more to just putting a tunnel ram on a motor. At your C/R and not knowing anything about heads, cam, Ing. so on. You may have to much carb already? Please tell us what this motor is all about. What trans, and rear gear are you running, and the cars primary use?
Yes, you should be able to pick up 2 or 3 tenths by doing some minor modification and tuning on your Hot Rod. You will kill that motor putting that much air and fuel into it!
Most people do not understand what volumetric efficiency is. In other words the air and fuel you put into a motor is used to it's max potential. Via the proper carb or carbs, heads, cam, C/R, and Ing.
Ed, and MC gave you some good advice run with it! So post your info. on this motor. So someone can give you some advice on what to change to make it run better.
Dave