Dont just replace the upper plenum gasket, the egr pipes kill those plastic plenums, which is why your motor is locked. dorman sells a updated plenum assembly with updated egr pipes for your lower intake, all for like 120 bucks wholesale. new upper plenum, update the egr pipe, new plugs she will fire right up. turn it over a few times with no plugs in it to get all that coolant out. parts availaible locally anywhere