Mine is modified. It's not using the big plenum anymore as it had to modified to except a fuel injection hat. So now it is like the bottom piece has 2 2inch spacers adapted to it.

Haven't compared it to anything else as it was just what we had at the time.

It's on a 500ci 440 with 12.5:1, OOTB edelbrock Victors, .700 lift 283/288 @ .050 Solid roller and 2x alcohol 750 quick fuel.

Thinking the manifold is holding us back as it's not making power above 6000. Normally shift at 6200 and went 10.09 @ 132mph. Shifted at 6500 and 10.19 @ 131mph. And running out in the top end. This is at 3100lbs.

Would have liked to have done a back to back with the Indy, but looks like we have to open up the heads...