First of all, it depends on the type of hull you have. If you have an old 170 like mine, I would say you don't need them. She responds quite nicely to trim and jumps out of the hole with the vim and vigger she should. Some of our 170 family members have tabs on their boat and love them.
If you have a bigger hull, like anything bigger than the 170, you might consider them especially as you approach the 222 size or if you have something heavy like my 230 Explorer I would say yes, you'll want them. Allows you to level her out when running and jump up on plane quicker.
Let me look, hmmm, you have a '79 222 FF - a cuddy type boat - yup, I agree with Bob, put them on. You'll get better response with them.
My $.02