My carb is definitely tuned a bit rich.
It is the performance jetted version of the Thunder Series after all..
I don't have a wideband like you Gary, but if I can get the 450 Y-pipe to fit, I will when I do the engine swap..
Without knowing A/F and having always been on the ragged edge of detonation with my advance curve, I would rather burn a little fuel than have a hole in my piston.
All I can say is try it on stator current and see if it works for you.
If the truck is fat and stumbling when half warm you can always add the extra complexity of a relay triggered by the stator wire.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.