I know there was a Hot Rod article back in 2016 on this engine, but here is a video of it running on the dyno. Not sure if this has been posted before so sorry if it has been.

https://www.youtube.com/watch?v=AsvCAp87cSY

Note by the engine builder, Lynn Peterson: This engine actually makes 474 HP. We screwed up and did not set the linkage correctly on the contest dyno, so the carbs never opened up all the way. Top RPM was 6,000.