408 tuning with a Wideband sensor

Bushing works perfectly. Set the initial to 24 and it hits 34 exactly at full advance. Now I was able to get the idle ratio in the mid 14s where it belongs. Only problem I have now is I can't get it to idle below 1000. I have the street idle screw backed all the way out. If I pull on the throttle linkage I can get it to idle down so I may just need a stiffer return spring. I'm seeing around 12 on the meter when cruisng so I'm going to drop the main jets from 71 to 69 and see what happens. My max manifold vacuum is now around 7-8 so I'll switch to the 4.5 PV also.