I can say that I have had 6 way Bonnies and have 12 way Bonnies now, but the offset of the seat as compared to the steering wheel annoys the sh$% out of me, but I am going to take care of that this winter. Also I have installed Roady seats in a Caprice and they are really nice and direct bolt in if you don't have a center console, but if you do, it isn't a huge deal to cut of the portion of the drivers seat on a Roady seat that extends over in place of the console. FWIW the Impala seats are modeled of the Roady frames. As far as the others that you have listed haven't seen them installed in a caprice or an imp for that matter, worst case go to the junkyard and try them out, anything can be made to work, but you may have to fabricate your own style mounts to get them in right.