[blykins]

I can show many articles relating to the EMC where that amount of torque was made at that rpm by Windsors and Clevelands both.

From his post-EMC interview, Jon mentioned that he didn't do much to the CHI heads at all.

It isn't absolutely necessary to use 3V components with the 3V heads, others have adapted 2V manifolds to them. However, if the whole combination works, there's nothing wrong with paying less for the 3V intake than what it costs for a nice Funnel Web intake.