4bbl intake question

It won't blow it up, no, but it also won't be the most effective use of your money, time, and effort on a stock slant-6. What is your goal? I don't mean "To have a 4bbl carburetor" (unless all you want to do with the car is point under the hood and say "Lookit my 4bbl carburetor!"), I mean what do you want the car to do that it doesn't do now? Those are the terms to think in. Picking actual parts is the last step before buying and installing…not the first step.