Tell me about seats.......?

[A1971Blazer]

I got this '70 K5 CST......body is rust free (repaired where necessary)....decent paint..


I'm gonna get GrumpyOldMan to build me an interior.....he's really close to me and does incredible work...!


OK I have two sets of seats

the blue style came in it as I bought it........the bare one is out of a '71


back side..........one has a larger back rest and a metal cover....


blue one latches on the right...........other one.....center latch


the floor mounts match at the front....but obviously the rear does not and there are no holes existing in the center.........that's no obstacle.....

just wondering which one will sit better/firmer/more comfortable?

the foam in the blue ones is worn out...gone in the others

gonna take the brackets and get zinc plated with gold chromate.......one set of seats will be "discarded"....