64-66 cuda fold down seat into 63-66 dart

briansb71 said
Anybody still read old threads? How much/what are the differences between a 1963-66 Valiant convertible back seat bottom and a 64-66 Barracuda back seat bottom? Interchangeable.

I have one of each, but have never thought to measure. On my way to a July 4 dinner now, maybe can measure the seats later if no one beats me to it.