Actually the 2v isn't that bad at all but where they start looking weak is when you start comparing them to stock LS1s. Sure you can make the CI to Power ratio but on the street and at the track it usually comes down to what you run not how efficient it is. My old car as far as 2v cars went was very fast for what it had done. I had an absolute blast with the car and would do it again BUT on any given night I could run a 12.2 on slicks and the guy next to me with a bolt on LS1 and DRs would be running next to me/flying by me or a stock LS1 with the bottle on stock tires.
I've had this discussion in other places about just how long with the 2v stick around. I'm sure it won't completely disappear but I see it being like the old Cleveland 351 engines. Some day it will be just a handful of people that stick by them while the masses move onto the latest and greatest or the most readily available (SBF or 4v modulars).
Bill