With the big cam we run a 1050 on a 2" spacer , small cam we went down to the 850 bg ,the bg guys say that the 850 will flow over 1000 any time any where? You are showing a major gain with your cam choise , a 104lsa just blows me away on how my mind isent grasping the cam timing thing , with a 104 lsa means more overlap , with my fender well headers at a low idle around 1000 rpm the 106lsa will just about suck your shirt off if your close to the header, at 104 lsa I might be sucken down low flying birds, might have to put a screen up or something?