Who's using o'donnells

[Tex]

yep, if it's on the rich side it will shift later because the RPMs aren't there to cause the pawl type 2-speed to enguage. The motor has to be spooled up in the RPMs to give enough force to open the pawl causing the 2nd speed to catch.

Opposite happens when it's a bit leaner than normal. The 2-speed will catch earlier.

If your temps are around 220F with the body on I'd say that's a decent temp for how cold it is outside. I would leave your tune where it is and adjust your 2-speed adj. screw. If you loosen the screw it will shift sooner.