All,

The '88 Westy my son and I will be driving back from Calgary has rails in it.   I have found a single, swivel seat, with under-seat compartment - actually two of them.   I am contemplating getting one to allow the young fellow, and his car seat, to ride a little closer to the front of the vanagon ... so I can actually hear him and he me. 

What hardware is required to mount the seat to the rails?  I presume there are bolts or pins which prevent the seat from sliding  when installed.

Roy