Was checking out some of their stuff.  Look through their galleries, some pretty intense f-bodies (drag race), but still cool.  They do some roadrace vette stuff.  They provide a lot of info in the "How To Build High Performance Chevy LS1/LS6 V8's".  I never knew about the timing chain tensioner that GM's makes but did not provide from the factory b/c of cost.  Also, drilling holes in the lifter trays, etc.
Wheel to Wheel Powertrain
 
