Help

My son has a '68 Valiant that he is installing a '72 360 into. Problem is when the engine was rebuilt ( buy someone else ) the dip stick tube was not completely removed and there is still a piece of it in the existing hole. The engine is in the car and we can't go much further untill we can remove this and install the new one. Any suggetions greatly appreciated!
gio67cuda
P.S. We tried an easy out - no go