Seminoles -
It sounds to me like you didn't get all the hoses hooked back up, or didn't get the tight enough.
I would guess you have a leak somewhere in your intake hoses. The MAF is freaking out because you are getting unmetered or turbulent air into the intake stream.
THE FIX:
Go back out and check every hose, and make sure it is where it is supposed to be, and make sure they are all tight and not letting in air. I would really check the worm clamp that holds on the open element filter. Crank that bad boy down...(Don't bust it though)...
Let us know what happens...
Patrick