A few years ago there was a Hot Rod Magazine article using a freshly built 225. I'm pretty sure Magnante was involved. On a dyno they went from 1 bbl, to 2 bbl, to headers, to 4 barrel, to Aussie short runner, and then right about when they were going to Aussie long runner (hyper-pack), they had engine problems and stopped the testing. I think it was an aluminum block. What I do remember was the biggest jump in power was simply going from a 1 barrel to a 2 barrel. Someone could probably find a link cause it was discussed here.
