Mike I installed the drivers seat with the existing adjuster and a 3/4" spacer on the rear attachment studs. On the passenger side, there was no adjustment mechanism so I made a rail out of 1 1/2" square tubing and also a 3/4" spacer in the rear. Of course the passenger side is not adjustable but it clears the rear glass at least an inch and a half. I could've redrilled the mounting holes in the floor pan to move both forward; but this will suffice in the meantime. I installed large fender washers underneath but maybe late I will make up a solid plate to tie all 4 mounting holes together for piece of mind. Again, thanks a lot Bud.