split bench backs??

Okay, so I will be the first to admit that I may have bitten off more than I can chew. I spent about a grand to get everything I need to redo my interior for my 71 swinger. But when I went to take of the old covers to be replaced I stalled out at trying to get the seat backs off of the split bench. Am I making it too hard? Or is there a trick to it? I'd love to get the interior in the beast, but I'm stuck. Thanks guys.