I ahve LeSabre seats in mine now. FYI way too flippin' high for a six footer. I have a set of probe seats that I might retrofit also. I have run into a set of 730I BMX seats that I hope will be low enough, if not they are going in the Willys.
I am not sure about the Bronco II seats but I ahve the flip forward mechanism on the passenger side seat. I would be careful on how you mount the seat to it as it can tend to get a little high also. Good luck!