type 3 floor pan\'s interchangeable???

Excuse my ignorence on type 3's but are the floor pans interchangeable between fast backs notch's and square backs. Or are they are all diferent or which are interchangeabe with a square back.

ther all inter changable between any model even early to late model bodies as well even to a Type 34 Ghias

excelent thanks for that it has helped me out heaps. saves me buying cars if i don't need too. cheers