Hi,
Just browsing and saw this, looks well!! Forget the comments about the 34's being too small, my brother in law is a dairy farmer in Stafford, I spent some time with him three years ago during which i drove his 2650, it had been set up for spraying with a wide wheelbase with its first owner so after servicing it I changed her back to standard. There were 34's on the rear and as a result the tractor sat down the way yours does so theres nothing wrong with the accuracy of your model- however going by the handbook you could order 36's which still matched those front tyres so the choice is yours!!
Neil