I did the 67-later pans about 25 years ago in a 65 Dart as that was the only thing available for an early A. they turned out OK - not the prettiest but serviceable. Fast forward to now - EXACT FIT early A floor pans are now available. I used them for both fronts and passenger side rear and so much easier than trying to make/modify later pans fit. If it were me I’d sell what you got and use the correct pans
