When I installed some cheap Recaro's I got from some import wreckers I used the part that bolts to the floor from original seats, and welded angle iron to those brackets to suit the recaro's. It took about an afternoon to do it, and was approved peace of cake. (QLD)
Heres a phew pics of what I done.
You can see on this that the brackets for the reclining part of the seat and what bolts to the floor is all one. But you can just grind so rivets off so you just end up with the two runners.
This is a dodgy pic of eveything bolted up to the new seats. To get everything lines up, I just bolted the runners to the floor of the cab, and bolted the angle iron to the seats. Then place the seats inside the cab on top of the runners, line up, then tack weld. Check everything looks ok, then remove the seat from the cab and do the proper welds.
Then the final product after getting the seats and all the interior re-trimmed.
