Yep. The Intense modular setup is the one for the serious guys. They have excellent produts, back them up, and the finished product is always A-#1 when installed under proper conditions. Pulley Boys gets my vote for Series I.
I second Rogue'* comment on the pulley size. When I installed my 3.4 I was getting no KR. That was when the temps were in the 30'* for highs. Was considering going down to a 3.25" and now have decided against it since the daytime temps are getting into the 80'* and 90'* and I'm seeing KR in second.
I'm gonna be selling my 3.4" Magnuson and 3.8" factory press on'*, and get a Intense modular setup with a 3.5" for the track and see what I can get for as close to 3.8" for the road (mpg).
Once I get some more cash together I'm hoping to rework my heads and maybe drop down to a 3.3" for the track.