c30 cab size

[arcticman]

Hello everyone,
I have a standard bench seat in my 1967 k1500. It is that original standard folding bench seat with basic thin molded foam bottom and coil spring back with cotton batting for a pad. I have the opportunity to purchase a used seat out of a 68 C30.
I've seen pictures of the seat springs, it is a 67 68 folding seat, coil back but the bottom has a little different spring set up and better cushion.
My question and concern is headspace clearance. Is the cab on the C30 a larger cab or different floor configuration that would make installing this seat a mistake inasmuch as you would be looking through the top of the windshield
thanks