I have no problem with Comp at all, although I think their power range is overestimated and their compression requirements are lower than should be. I have to run a cam with at least 112 LCA due to my fuel injection requirements. OBD1 is quite forgiving but OBD2 is a different story and OBD3 is an entirely different animal. I still have to pass emissions with this so that is another parameter I have to keep in mind.
Although both engine are essentialy I6's, our build parameters are quite different in regards to displacement, induction, rpm capability and performance requirements. I could drop in a 4.2 AMC crank and have 4.5 to 4.7 liters of displacement. My vehicle is also 4WD and needs a broad torque curve. A 108-110 LCA would be great but with FI and my emission requirements, it aint happenen', lol!
You've got a great build going on and please keep us all updated! I know that Memike will really want to know about your present build. BTW, it sounds kick ***. :) I've never heard a L6 lope like that before and puts the sound of a BMW E45 I posted on another thread to shame.