I had this same problem on my 82 SD. I'm not sure its the route you want to go but I took a 2x4 and rapped it with vinyl held it against the lower seat frame while smacking it with a rubber mallet. It worked for me!!

__________________
Brandon



2008 S550
1957 Dodge D100
1967 VW Microbus 21 Window
2001 Suburban
2004 Beach cruiser bicycle
-----------------GO DUKE!-----------------

"It cannot be emphasized too strongly or too often that this great nation was founded not by religionists, but by Christians; not on religion, but on the Gospel of Jesus Christ. For that reason alone, people of other faiths have been afforded freedom of worship here." Patrick Henry 1776