What year reclining seats will bolt to '84 frames.

[zoomer]

I have been searching forums for a while, and I am having a hard time identifying what seats will bolt to the factory frames (without modification) in my '84.
I would like reclining seats and just want to replace the seats, but NOT the brackets. Is this even doable, or did they completely change the mounting holes of seats when they went to reclining?

Thanks for your time.

Oops, thought I should mention '84 K5 Blazer (I know it's a blazer site, but sometimes people post other vehicles)

 

[frankin5]

different frame different mounting locations especially on passenger side.