[Jerry Clayton]

It is not so much a disadvantage using a carb as an advantage using EFI with so much computer control.
If you are only looking for about another 100hp you can easily get that with 4 or 5 lbs boost and either a blowthru carb or better one in a pressure box. You have to balance the pressures on the float bowls and fuel regulator and will need a device for retarding the spark as the boast comes up. If you are only looking for a modest gain you can probably get by without an intercooler.
Your engine probably would be strong enough for the extra HP as you are now limited by airflow with NA.
With a LOT of boost, the pistons need to have strong ring lands and a full skirt, Piston oilers off the main webs as we put in our dual turbo engines help a lot also.

Jerry