Just stick with the cast iron block.... If you build a 410 you can run it around here locally when the series is dormant and you can make the show. Trying to start something with spec stuff where you are limited to one venue will discourage people. The guy at Red Hill wanted to do that with a Jasper spec engine a few years ago and it was too hard to sell . Everything from bombers to modifeds run a 400 based powerplant. That makes parts readily available. If a guy gets too dominant ... start him on the tail ... Traffic is the great equalizer .
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