Having 2-3 shift overlap - Thinking of switching from 4.2 apply lever to 3.8 - Any Other Thoughts?

Is there a center spring that I could order or pick up to add to my current billet servo? I hate to buy a whole new kit if I could avoid it. Maybe someone has an extra? Maybe I'll talk to the locan transmission guy. Just asking. I want to get it back together asap.
Thanks again, guys.
-Doug