Is anyone running a 4.7L???
If you add two more cylinders to the V6, you would the. Have a 318. The V6 IS a 318 minus the two cylinders! The 4.7 is NOT, I repeat, NOT a modified 318 as it was touted by sales men back when they we're new. This bull **** sales pitch was so made as to install customer confidence.
There is nothing out there for the 4.7's for upgrading performance. The engine has a bad rep not only among customers but mechanics as well as mentioned above.
If you want to do something modern, it isn't the 4.7. It is either a HEMI, a Magnum or a serious "LA" build with the aftermarket supporting all the new tricks your after.