Wich intake manifold 4 a Holley600?

As long as it's a dual plane intake and it fits under hood you should be okay. If you have stock 318 heads I'd stick with an intake with 318 ports so they line up and you don't get turbulance in the intake track.....a 340 size intake runner with a 318 head port is not good.....there is a "wall" for the air/fuel mix to hit and the fuel drops out of the air. If the Stealth has 318 ports go with it....if not I'd go with the Edelbrock Performer intake. Just my opinion.....I'd wait for some of the other who deal with mostly street and mild engines to chime in here before you pull the trigger on one.....I tend to lean more towards strip use on things.....