Figures. IT is a post 1975 tractor. There is literally NO information out there on those model codes.
But all of your date codes point to october-November of 1975. And the serial number does as well. 450000 was beginning of 1975 and 490000 was beginning of 1976.
So you indeed have a 1975 tractor, that is NOT a 4400 cause those ended in 1974. And I dont believe it is a 420 cause they didnt start until 1978.
So my best guess is a 4410???? I think that is the tractor that bridged the gap between the 4400 and 420. But I have no information on them at all. The steering matches the 420 for sure though.
Perhaps RickB will chime in here. He is good with these older fords...
Here is a thread really similar to this one
http://www.tractorbynet.com/forums/...9-ford-industrial-tractor-identification.html