I just finished mine. I took seat mounts out of a Ford (pardon me) Econoline ... a buddy of mine cut them down to change the angle and height, welded them back together (quite a project!) and bolted them to the floor.

I just did this a few days ago and will be posting pics here, soon:
http://www.AlanHorvath.com/54chevy/new_seats_install.php

The seats will be coming back out again, as soon as the weather warms up (like in March I hope), and then I'll be stripping the interior floor out, putting FatMat and new carpet down and then the seats will go back in.

I'll be posting photo and/or video tutorials every step of the way at the link above.

~~ Alan Horvath
1954 Chevy Pickup
Singing his praises in the
Passing Lane