This seems to have wandered off topic... and Don Moors hasnt yet pointed it out yet. The key here is rules.... and interpretation & enforcement.
Nobody in the national midgets sees a need for a DOHC engine, given the rules stacked against it. If a guy wants a national motor capable of winning races... right now that is #1... Toyota... #2 Esslinger #3Fontana???? Dont recall a Mopar W-9 winning this year.... but Mopars market share has been slipping... hence the OHC motor. Stewarts Chevrolet motor won a race... maybe 2 all year?
So what is the driving force of this discussion???? little guys cant or wont spend $34000 for a new untested piece? or now a W-9 is going to be $8500 because big teams are going to want the newest 'legal' mousetrap???
National guys dont car about affordiblity... they care about winning. buying the advantage is what they do....

This is sure to piss some off...