I doubt seriously that building a 292 CI sisx to the 300 hp level is going to be an economy build. I'm sure they have run 11's in the quarter, but I am also sure that the only thing close to stock on the engine was the block!!

With 350's in such great abundance, and almost everybody and their brother building them, parts are plentiful and cheap. I've seen good heads and intakes go super cheap at swap meets. The 292 parts would not be near as plentiful or as cheap, and stock they aren't much to write home about.