Just be aware that Crabbing the Spine Frame is a Pete Roper technique, often imitated, and (for safety's sake) should only be performed with the assistance of Colin, the rubber chicken, or one his brethren.
Digitally remastered sketch here.
Looking at the (low res) photo a couple posts down, I see the left porkchop is still in place. I have no idea why. Pete posted it's easiest to take them off. Just be sure to note the depth of the mounting pins before they are in the parts tray.