I don't have good data on the swap. I went 9.91 @137 with the indy single plane and 950hp with a fuel delivery issue.

We fixed the fuel problem and went to the modman and 600s at the same time. I saw .08 slower with the modman without tuning for best et. We got a base line and tuned for consistency. We were on a short time table for the first NMCA race a few years back. Honestly, we have just left it alone and let it work for us.

To answer Andy F... It fit under my hood, so I went with it over the indy bathtub.