I don't know if the front-drive would have been a good or bad thing. But I understand Ford didn't want to try unibody on their own, and had the Budd Company make the bodies for the 1961 Thunderbirds. This continued through 1966. This is the Budd railroad car company, which might help explain why these things are built like a railroad car -- almost 5,000 pounds and so solid that they could beat up everything else in a demolition derby.
But that also explains why the front wheel wells are so huge you could throw a party back there, but the engine compartment has no room -- barely enough for a 390 big block.
Another tidbit -- they used a 1963 Thunderbird to film the movie Flubber. Why? Because of the body -- they were able to make it into a four-wheel-drive, so they could put it on a lift and film it with all four wheels turning. They only made one car this way, unlike most movies which utilize a handful of cars. I heard this from the people who built the car -- uh, tooting my own horn, they sent me the radio for conversion.