My revisions, 1/2 cup of molassas and substitute currants for the raisens. Also, doubled up on the sugar.
I kept my eye closely on this, as another commentor stated it was hard to get out of the pan. However, the molassas seems to slow down the process, and it took a full hour to bake to done.
Worth the wait, and then some! Out of this world, chewy, rich and delicious.