I don't think a st.dom. is a big enough intake for optimum performance from a 512 , it reportedly is a good intake tho .
I have tried and run a torquer 2 , a wieand team G with a turtle added to it , and a victor , all port matched to my heads .
If ur after performance , and not concerned about hood clearance , the new trickflow version of the victor is probly the best out there . A cleaned up victor is just as good in my opinion and is what I`m running.
The team G , I have setting on the bench may be a little better seat in the pants feel on the street than my victor.
The bigger engines aren`t hurt by single plane intakes much , they have lotsa torque to start with .
Check Andy F`s articles ----------