Can someone give me a little more info on the LMI a/f meter? Cost? Availability? How it works, etc. I can tune a carb to run decent, but I can't get it to the gnat's ass. I am having the same issue with the 800 dp Holley on my 426 as I had with the 750 sp... there's a slight stumble right off idle. I haven't tried drilling holes in the primary butterflies yet. Thanks