MRL Performance

We had a cracked cylinder head leaking water so we pulled out of the contest and never got listed in the results. Even with the head blowing water out the exhaust the 292ci/273 made something like 480 horsepower prior to the contest. Here are listed results of other engines including MRL's entry.

http://www.rockettbrand.com/downloads/articles/Engine Challenge Small Block Part 3-Mopar Muscle Jun 2010.pdf

Looks like MRL built a 470hp 340 that used unported RHS x-heads and he used a solid flat tappet cam while all the other seem to have solid rollers.
Was porting allowed on the heads in that competition?