The Holley Economiser(don't know the list#) is a spreadbore but the CFM might be too big. Then again, it is set up like the Q-jet which (when tuned right) can supposedly be made to run on just about any engine. They have have small primaries with double boosters in each which makes them very responsive. In David Vizard's Book --How to build horsepower vol.2 Carburetors and Intake Manifolds-- He write's:"It is difficult to have too much CFM on any engine of 200cid or more with this carb due to it's air on demand design" he then goes on for several pages explaining how to calibrate, and modify them. Is anyone out there running a Q-jet on a inline six?? Just curious.
