Craig I can only say they appear to have an adjustable back, they also look like a high performance style seat that would hug a body quite well. They canMe in a vehicle I bought, not fitted but intended as a direct replacement to the seats in a gq patrol. The seats were not mounted but have been at some stage. I am not going to use them as the side bolsters are relatively high and they may be difficult to acces if the steering wheel is in its lowest setting. All considerations but they don't appear to have been used much at all despite the age. It's entirely possible, only guessing as this would be my action, to mount them onto a patrol base first, might need an adapter bar of sorts or look at a hurricane base kit that are used for the ford or Holden seats. Hope that helps. You are a fair distance from me, but welcome to sit in them before committing.