Ken, I used the 41 series pro street drag. Here is the link to a thread that talks about what I did. obviously I have to put another one in because of the new rule. Driver and passenger has to be identical.
I used the Kirkey brackets to install, but you can fab them yourself. Simple bolt in really and I find them to be very comfortable. I bolted the bracket to the floor, then the seat to the brackets.
http://classracer.com/classforum/sho...542#post356542