1993 Dodge Caravan Intake Manifold Bolts

While changing the rocker arm and rocker arm shaft I dropped a bolt and had to remove the intake manifold. After removing the bolt I cannot get the intake manifold back on. The two outboard bolts seem to have something in the way or blocking them. I've tried blowing them out and brake cleaner. The holes are too shallow. I am at a loss because I took them off so they DID fit before. Any advice would be so very much appreciated.