740 seat mission

Looking to Frankenstein 2 sets of 740 seats together, (same material) assuming this should be fairly straightforward?

Looking to take the rails/mounts from seat set 1.
Install on bottoms of seat set 2.
Somehow get top half foam from seat set 1 under top half material from seat set 2.
(Then I assume profit/crush)

Are there any tricks or Swedish secrets I should know to make this happen?

Thanks

The seats are easily disassembled. The fun part will be putting them back together.