Be careful with this^ without at least 11"hg vacuum this system won't work effectively (per FAST). If the engine has more than 10" it's great, I found out the expensive way and now have a new ez 1.0 sitting in a box.
I have a 2.0 on my 440/505'' wedge, at times during diff. throttle positions I have 11' or so, my system seems to be adapting to it better than stated above.
