Intalling racing seats? help please

Hi I'm new to the forum.....I searched around but no such luck!
I'm trying to install new seats into my car but the problem I face is fabricating a base for the seats.



Some pic down below

http://i2.photobucket.com/albums/y40/teck66/P2160009.jpg

http://i2.photobucket.com/albums/y40/teck66/P2160010.jpg

http://i2.photobucket.com/albums/y40/teck66/P2160013.jpg

I tried removing parts from the original seats but their welded to the seat frame lol

http://i2.photobucket.com/albums/y40/teck66/P2160012.jpg

http://i2.photobucket.com/albums/y40/teck66/P2160011.jpg

these are GaragePro seats from JCWhitney- good price:licka:

http://i2.photobucket.com/albums/y40/teck66/P2160014.jpg



-thanks in advance