I don't know...what should it cost, 25K-50K? What is someone willing to pay might be a more pertinent question.

I've never really looked at the price of entry as the be all, end all...what I really want to know is, how much does it cost to race, and maintain?

Would it be a valve springs every 10 passes engine? What's the life expectancy of say... rockers, valves, lifters, piston rings, bearings?

Not being sarcastic, I'm completely serious, because this is where the true cost of an engine manifests itself, not the sticker price to bring it home!