Morris Minor Owners Club

As the springs and foam on my porcelain green rear seat base are way beyond their best I am looking for a replacement. Now I have located a 1962-64 red duotone seat base for a reasonable price. The internals seem OK plus the springs look to be in better condition than mine.
My question. Would a 1962-64 seat base fit my 1966 Minor 2-door saloon, or are they different in size.
I am not too worried about the color as I plan to change over the seat cover to match my own porcelain green interior anyway.
Thanks for your help.

two door and four doors are different not interchangable

I believe the earlier duotone seats have a higher back than the later ones. It should still fit but it will look different and you will need to consider changing rear seat belt mounts if you have them

the seat bases are different shape

the seat bases are different shape