have to disagree, all these buckets are adjustable to get higher or lower or even closer to the wheel, have you never looked under a set, it's all there and sits great ..
Yes, depends on your posterior, and yes. LOL
All of the a-body bench seats I've been on place you higher. None have been like a sofa - rather very firm.
The oem buckets in my '68 bacaruda put me lower than I liked for the steering wheel and never did like them for their support.
However the buckets can be made to sit higher. So that's a plus.
One problem with going too high is when wearing a race helmet it can touch the headliner. :( Peple with longer legs this is less of a problem since as the seats are further back there is more room.
I've liked some recaros (from older BMWs) and Flowfit or Flowform buckets, both of which will fit pretty easily. Neither looks quite original, but at least with the seperate moveable headrest their not distractingly out of place.
My .02 and change