86 4000s accel. pedal came off

["Browning David (TVCS)" <BrowningD@tce.com>]

While test driving my car last night to see if a fuel problem was fixed, the
accelerator pedal promptly flopped to the floor.  I looked up at the top of
the pedal and found that there is a metal "weight" it would seem where the
pedal attaches.  the top of the pedal assembly has a round hole, in which
this "spongy" round thing slips into.  This somehow holds the pedal and the
metal bracket with cable all together.  I couldn't see if anything else fell
out.  If anybody has any experience with this weird contraption, could you
please help me out?

Thanks,
dB

86 4000s (4-cyl. -- 5spd)  Note:  The 4-cyl. Auto looks to have a different
pedal assembly and the Bentley manual is of no help.