'64 Valiant, '67 Dart Split Bench seat frames the same?

[George Jets]

Are 1964 Valiant, 1967 Dart Split Bench seat frames the same?
1963-1966 a body 2 door split bench
1967-1969 a body 2 door split bench

We are trying to help RustyRatRod with new seat covers for his 1964 Valiant 2 Door Sedan Post Car.

Anyone know if they are the same seat frames? Looks like they both measure 52 Inches wide on the seat bottoms with the seat covers on.

Thanks, George Jets